Rewrite the expression using the negative exponent rule .

Combine and .

Combine and .

Apply the product rule to .

Apply the product rule to .

Raise to the power of .

Multiply the exponents in .

Apply the power rule and multiply exponents, .

Multiply by .

Apply the power rule and multiply exponents, .

Multiply by .

Simplify (6m^-4n^7)^2