$8\left(2y-3\right)+4$
$625s^4\:r\:^2-144s^4\:r^6\:$
$-9b-11a-17b-81b-b-110$
$\left(7\right)\left(-2\right)\left(-15\right)$
$-14x\cdot2$
$2x^2-x^2+3x^2$
$4x^2-x+2$
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