Copyright Arash Partow (1999-2020) Free use of the Mathematical Expression Toolkit Library is permitted under the guidelines and in accordance with the most current version of the MIT License. http://www.opensource.org/licenses/MIT Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.