$\sin\left(2x\right)=\left(\tan\left(x\right)\right)\left(1+\cos\left(2x\right)\right)$
$.125\int_{-2}^xdt$
$-231+79+51$
$a^3+b^3$
$81\:-\left(-19\right)$
$\left(mn-8\right)\left(mn+8n\right)$
$y^2+18y$
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