$3\cdot\left(-0.5\right)^2-2\cdot\left(-0.5\right)-1$
$y''+2y'-3y=0$
$y'+y\:=\:-e^x$
$\int\sin^2g\left(x\right)dx$
$7m+8m+9m$
$k^2+17k-70$
$12h^2-46h+42$
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