improve equality checks involving tuples, vectors, intervals, and arrays

[dqnykamp]

This PR upgrades math-expressions to a version has improved equality checks for tuples and related. The following changes where made:

• tuples, vectors, altVectors, and open intervals are considered identical even deep inside a mathematical expression
• arrays and closed intervals are considered identical even deep inside a mathematical expression
• tuples, vectors, altVectors, and open intervals are treated as identical when sorting
• arrays and closed intervals are considered identical when sorting.

In addition, the complex numerical answer validation will always be available if symbolicEquality is not specified, even if the expression contains operators such as logical or set operators.

Fixes #168