Question
Add the following expression:
$5 a^2 b,-8 a^2 b, 7 a^2 b$

Answer

$5 a^2 b+\left(-8 a^2 b\right)+7 a^2 b$
$=5 a^2 b-8 a^2 b+7 a^2 b$
$=12 a^2 b-8 a^2 b$
$=4 a^2 b$

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