Find the difference: (6y3 + 17y - 3) - (4y3 - 11y + 9)

Assuming that your numbers are 6y3 means 6y³

first step we will eliminate the first parenthesis and change the sign of the numbers in the second parenthesis, because we have the minus in front of it

second step-we combine like terms

6y³+17y-3 - 4y³+11y-9=2y³+28y+6