Evaluate
-13x^{3}-17x^{2}-4y^{2}
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-13x^{3}-17x^{2}-4y^{2}
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-13x^{3}-5y^{2}-\left(-y^{2}\right)-17x^{2}
To find the opposite of -y^{2}+17x^{2}, find the opposite of each term.
-13x^{3}-5y^{2}+y^{2}-17x^{2}
Multiply -1 and -1 to get 1.
-13x^{3}-4y^{2}-17x^{2}
Combine -5y^{2} and y^{2} to get -4y^{2}.
-13x^{3}-5y^{2}-\left(-y^{2}\right)-17x^{2}
To find the opposite of -y^{2}+17x^{2}, find the opposite of each term.
-13x^{3}-5y^{2}+y^{2}-17x^{2}
Multiply -1 and -1 to get 1.
-13x^{3}-4y^{2}-17x^{2}
Combine -5y^{2} and y^{2} to get -4y^{2}.
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