Rewrite the division as a fraction.
Multiply by .
Combine.
Apply the distributive property.
Cancel the common factor of .
Move the leading negative in into the numerator.
Cancel the common factor.
Rewrite the expression.
Factor out of .
Factor out of .
Factor out of .
Factor out of .
Simplify (9y^4+10y^2-1)÷(y-1/9)