Question

perform the following additions and/or subtractions:
$(3y^2 + 4y - 4) - (3y^2 + 7y + 5) + (5y^2 - 8y - 1) = $
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Explanation:

Step1: Remove parentheses

$3y^2 + 4y - 4 - 3y^2 - 7y - 5 + 5y^2 - 8y - 1$

Step2: Combine like $y^2$ terms

$(3y^2 - 3y^2 + 5y^2) = 5y^2$

Step3: Combine like $y$ terms

$(4y - 7y - 8y) = -11y$

Step4: Combine constant terms

$(-4 - 5 - 1) = -10$

Step5: Combine all results

$5y^2 - 11y - 10$

Answer:

$5y^2 - 11y - 10$