To divide by a fraction, multiply by its reciprocal.

Combine and .

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 and .

Reorder the factors of .

Combine the numerators over the common denominator.

Move .

Multiply by .

Raise to the power of .

Use the power rule to combine exponents.

Add and .

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 .

Combine the numerators over the common denominator.

Simplify 1/(b^2)-(1/(y^2))÷(1/b)-1/y