$196^2$
$\left(secx.cscx-cotx\right)cosx$
$-5\cdot19\cdot\left(-8\right)$
$\int2^x\cdot5^x$
$\frac{dy}{dx}=\frac{1}{y^2-2y-1}$
$\frac{k}{4}+3=14$
$\left(x+2\right)\left(2x-3\right)$
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