Evaluate
-5a^{2}-3b^{2}
Differentiate w.r.t. a
-10a
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-5a^{2}-7b^{2}+4b^{2}
Combine 5a^{2} and -10a^{2} to get -5a^{2}.
-5a^{2}-3b^{2}
Combine -7b^{2} and 4b^{2} to get -3b^{2}.
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