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

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

Multiply and .

Raise to the power of .

Raise to the power of .

Use the power rule to combine exponents.

Add and .

Multiply and .

Reorder the factors of .

Combine the numerators over the common denominator.

Multiply by .

Multiply by by adding the exponents.

Move .

Use the power rule to combine exponents.

Add and .

Simplify 19/(xy^2)-(7y^2)/(8x^2)