What is the greatest common factor (GCF) of $x^6$ and $x^4$?

Multiply or divide, as indicated. 15p³/9p² * 12p/10p³

Perform all indicated operations, and write each answer with positive integer exponents. {x- 9y^-1}/{ (x-3y^-1)(x+3y^-1)}

Multiply or divide as indicated. 55.76 * 72

Simplify the expression using exponent rules.

$\left(-5a^2\right)\left(3a^8\right)$

Simplify the expression using exponent rules.

$-\frac{12b^{11}}{4b^7}$

Rewrite the expression using exponent rules.

$\left(4x^2\right)^3$

Rewrite the expression using exponent rules.

$\left(\frac{3x^4}{y^{-2}}\right)^3$