$81y^2-100$
$\frac{-3x}{2x^2+10x+12}$
$-47.90-86$
$1+\tan^2\infty=\frac{1}{\cos^2\infty}$
$x^2-40x+400=0$
$\frac{dy}{dz}=10-0.2x$
$\sin^2\left(x\right)+5\cos\left(x\right)+5$
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