fixed rule docstring decriptions
simplified some tests
added method to convert sympy polynomial tree into tree structure for project
simplified polynomial instantiation, and tests
added remaining rules. Minor bug fixes on factoring rules
added new simp rule to remove fractions with num set to zero, and a test
fixed lcm test and code, other minor bug fixes
added simp7, changed working mem entries, some debugging
modified mult2 to distribute. Still needs to be changed to an atomic operation
added another full solution test
added two new simp rules and updated tests
changed working mem to store latex strings. Option passed to __init__
fixed a solve test, and modified addition() function
fixed another solve test