Simplify: x^-2 times x^-3
What is x^-5
Simplify: (x^-3)(x^9)(x^-7)
What is x^-1
Simplify a^7/a^3 and a^10/a^-1
What is a^4 and a^11
Simplify: (y^-9)^4
What is y^-36