$\sin\tan\sec^2$
$3x+4=-2$
$\frac{x^2+2x-2}{2x^2-2x}$
$x^2+7x+2x$
$\int_{-\infty}^1\sqrt{6-y}dy$
$x\:+\:2y\:+\:4z\:=\:24$
$2^2-9\cdot2+18$
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