i raised to exponents bigger than 4 is not calculated correctly #175

We came across an issue in which when algebrite tries to calculate i raised to a power "n" such as n%4 = 1 and n>1, it evaluates it incorrectly

Examples:

In reality, i^5 = i^2 * i^2 * i = -1 * -1 * i = 1* i = i
Same goes for i^9