Since is constant with respect to , move out of the integral.

By the Power Rule, the integral of with respect to is .

Simplify.

Simplify.

Combine and .

Combine and .

Cancel the common factor of and .

Factor out of .

Cancel the common factors.

Factor out of .

Cancel the common factor.

Rewrite the expression.

Divide by .

Evaluate integral of 8x with respect to x