diff --git a/exprtk.hpp b/exprtk.hpp
index afb9add..30d8b7d 100644
--- a/exprtk.hpp
+++ b/exprtk.hpp
@@ -955,14 +955,14 @@ namespace exprtk
             }
          }
 
-         template<typename T>
+         template <typename T>
          inline T process(const operator_type operation, const T& arg)
          {
             typename details::number_type<T>::type num_type;
             return details::process_impl<T>(operation,arg,num_type);
          }
 
-         template<typename T>
+         template <typename T>
          inline T process(const operator_type operation, const T& arg0, const T& arg1)
          {
             typename details::number_type<T>::type num_type;
@@ -1008,7 +1008,7 @@ namespace exprtk
          }
       };
 
-      template<typename T>
+      template <typename T>
       inline bool branch_deletable(expression_node<T>* expr)
       {
          return expression_node<T>::e_variable != expr->type();
@@ -1656,8 +1656,7 @@ namespace exprtk
             cleanup_branches<N>(branch_);
          }
 
-
-         template<std::size_t NumBranches>
+         template <std::size_t NumBranches>
          void init_branches(expression_ptr (&b)[NumBranches])
          {
             for (std::size_t i = 0; i < NumBranches; ++i)
@@ -1951,7 +1950,7 @@ namespace exprtk
 
    } // namespace details
 
-   template<typename T>
+   template <typename T>
    class ifunction
    {
    public:
@@ -2324,8 +2323,8 @@ namespace exprtk
          add_variable("inf",infinity,true);
       }
 
-      template<typename Allocator,
-               template<typename,typename> class Sequence>
+      template <typename Allocator,
+                template <typename,typename> class Sequence>
       inline std::size_t get_variable_list(Sequence<std::pair<std::string,T>,Allocator>& vlist)
       {
          std::size_t count = 0;
@@ -2788,6 +2787,7 @@ namespace exprtk
          ptr_t* p_;
 
       private:
+
          scoped_delete<Type,N>& operator=(const scoped_delete<Type,N>&);
       };
 
@@ -3253,7 +3253,7 @@ namespace exprtk
             return synthesize_expression<sf4_node_t,4>(operation,branch);
          }
 
-         template<std::size_t N>
+         template <std::size_t N>
          inline expression_node_ptr function(typename function_node_t::ifunction* f, expression_node_ptr (&b)[N])
          {
             expression_node_ptr result = synthesize_expression<function_node_t,N>(f,b);
diff --git a/exprtk_test.cpp b/exprtk_test.cpp
index a933c20..6693416 100644
--- a/exprtk_test.cpp
+++ b/exprtk_test.cpp
@@ -784,6 +784,7 @@ inline bool run_test1()
       std::cout << "run_test1() - Error: " << parser.error() << "\tExpression: " << expression_string << std::endl;
       return false;
    }
+   expression.value();
    return true;
 }
 
@@ -997,6 +998,22 @@ inline bool run_test6()
                                  "x", "y", "z", "w", "u",
                                  "x + y + z + w + u",
                                  "x + y / z * w ^ u",
+                                 "x:=1.1", "y:=2.2", "z:=3.3", "w:=4.4", "u:=5.5",
+                                 "x<-1.1", "y<-2.2", "z<-3.3", "w<-4.4", "u<-5.5",
+                                 "x:=x+1.1", "y:=y+2.2", "z:=z+3.3", "w:=w+4.4", "u:=u+5.5",
+                                 "x<-x+1.1", "y<-y+2.2", "z<-z+3.3", "w<-w+4.4", "u<-u+5.5",
+                                 "x:=1.1+x", "y:=2.2+y", "z:=3.3+z", "w:=4.4+w", "u:=5.5+u",
+                                 "x<-1.1+x", "y<-2.2+y", "z<-3.3+z", "w<-4.4+w", "u<-5.5+u",
+                                 "x:=(x <= 1.1)",
+                                 "y:=(2.2 >= y)",
+                                 "z:=(3.3 and z)",
+                                 "w:=(4.4 or w)",
+                                 "u:=(u xor 5.5)",
+                                 "x<-(x <= 1.1)",
+                                 "y<-(2.2 >= y)",
+                                 "z<-(3.3 and z)",
+                                 "w<-(4.4 or w)",
+                                 "u<-(u xor 5.5)",
                                  "min(x,y) + min(x,y,z) + min(x,y,z,w) + min(x,y,z,w,y)",
                                  "max(x,y) + max(x,y,z) + max(x,y,z,w) + max(x,y,z,w,y)",
                                  "avg(x,y)",
@@ -1144,12 +1161,24 @@ inline bool run_test7()
          std::cout << "run_test7() - Error: " << parser.error() << "\tExpression: " << expression_string << std::endl;
          return false;
       }
-      T result = expression.value();
       const T pi = T(3.14159265358979323846);
-      if (not_equal<T>(result,(T(1)+(std::sin(x*pi)*(y/T(2)))/T(3)) * 10.0,0.000001))
+
+      T result = expression.value();
+      T expected = mf(sin(x*pi),y/2) +
+                   mf(sin(x*pi),y/2) +
+                   mf(sin(x*pi),y/2) +
+                   mf(sin(x*pi),y/2) +
+                   mf(sin(x*pi),y/2) +
+                   mf(sin(x*pi),y/2) +
+                   mf(sin(x*pi),y/2) +
+                   mf(sin(x*pi),y/2) +
+                   mf(sin(x*pi),y/2) +
+                   mf(sin(x*pi),y/2);
+
+      if (not_equal<T>(result,expected,0.0000001))
       {
          printf("run_test7() - Error Expected: %19.15f\tResult: %19.15f\n",
-                T(1)+(std::sin(x*pi)*(y/T(2)))/T(3),
+                expected,
                 result);
          return false;
       }
@@ -1170,4 +1199,4 @@ int main()
              run_test7<double>()
           )
           ? 0 : 1;
- }
+}