$9\cdot\left(-20\right)\cdot\left(-4\right)$
$y^2+15y+50$
$\int-\frac{14\left(x-25\right)}{\left(x+7\right)\left(x-1\right)\left(x-7\right)}dx$
$-5=\frac{3}{4}x-2$
$-85-6000$
$a^x+a^x$
$x-20=100$
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