$\frac{\cos\left(x\right)}{1+\sin\left(x\right)}=\sec\left(1-\sin\left(x\right)\right)$
$20m^2+44m-15$
$x^2\:<8xy$
$8+8\cdot2$
$\left(b-2\right)\left(b-5\right)$
$-4+5\left(-4+2\right)-6-3\cdot\left(2-4\right)$
$8y+6+7$
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