Hi!
For your first question:
When it looks like this, with an exponent, then parentheses, then an exponent, we should multiply the exponents.
[tex]((\frac{-3}{4} )^5)^2)[/tex]
[tex]5*2=10[/tex]
[tex](\frac{-3}{4})^[/tex]^10
P.S. As for your second question, I believe I already answered that on your other question!
