I don’t know what the question is, your just saying that
Zero pairs are generated by combining the EQUAL number of positive and negative numbers .
A zero pair could be -11 + 11
27^(4/3)+4^(3/2) can be simplified using roots.
The cube root of 27 is 3 and the square root of 4 is 2. This removes the denominators from the expression. The expression is now 3^4+2^3.
Simplify this and you get 81+8=89
2/32 - 1/16 this is the probability (in fractions)