Question

(y^5y^-2)^4

Answer 1

In general,
(a^m * b^n * c^p)^z = a^(mz) * b^(nz) * c^(pz)
You need these two rules of powers:
When you raise a product to a power, raise each factor to the power.
To raise a power to a power, multiply the exponents.

Answer 2

Thank you I get it now

Answer 3

You're welcome.