Group and Element Mathematical Operator Overloads

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Description The python version of the group and element classes have Mathematical functions for things such as adding them together, doing power operations, and other more complex ones such as (a + bc) all with making sure that the answer fits into an ElementModP or ElementModQ in the end. This is not built into the C++ version of these classes.

Possible Solution Implement the basic functionalities of this using mathematical operator overloading.

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