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4y^2-(-3y-(19y^2-4y))-(5+(-9y-5)) combine like terms

please help
at least with the last part
-(5+(-9y-5))

1 Answer

1 vote
4y^2 - (-3y - (19y^2 - 4y)) - (5 + (-9y - 5)) =
4y^2 - (-3y - 19y^2 + 4y) -( 5 - 9y - 5) =
4y^2 - (-19y^2 + y) - (-9y) =
4y^2 + 19y^2 - y + 9y =
23y^2 + 8y <==
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