$\sin\left(x\right)^2+5\cos\left(x\right)+2=0$
$\left(-3b+5c\right)\left(7b+16-4c\right)$
$7m^2+15m+2$
$\left(-1.9\right)+\left(-0.9\right)$
$\left(\frac{4x^4-\:16y^2}{2x^2+4y}\right)$
$\left(3x^2-y^2\right)dy=2xydx$
$x+7x+10y-3x$
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