To write as a fraction with a common denominator, multiply by .

To write as a fraction with a common denominator, multiply by .

Multiply and .

Multiply by .

Raise to the power of .

Raise to the power of .

Use the power rule to combine exponents.

Add and .

Multiply and .

Multiply by .

Combine the numerators over the common denominator.

Factor out of .

Factor out of .

Factor out of .

Multiply by .

Simplify 2/(15x)-4/(21x^2)