$2x+3y+7;\:x=3;\:y=-1$
$15+7-1\left(-4\right)$
$4x^2+6x-6x-9$
$ax+bx+1=y$
$\int6\:x^4\:dx$
$\int\left(9t+1\right)\left(4e^{2t}-3sin3t\right)dt$
$n^2-3n-110=0$
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