Answer
Add: $-3y^5+9y^4$
Subtract: $-3y^5-9y^4$
Multiply: $-27y^{9}$
Divide: $-\frac{y}{3}$
Work Step by Step
Add: $-3y^5+9y^4=-3y^5+9y^4$
Subtract: $-3y^5-9y^4=-3y^5-9y^4$
Multiply: $(-3y^5)(9y^4)=-27y^{9}$
Divide: $\frac{-3y^5}{9y^4}=-\frac{y}{3}$