$8m-2=4m-2$
$\lim_{x\to\frac{\pi}{2}}\left(\frac{cosx-\cos\left(x\right)}{1-2sin^2\left(x\right)}\right)$
$5x\left(2x+1\right)\left(3x-4\right)$
$3x^2-8x$
$1-x-12$
$\left(q+4\right)\left(q-9\right)$
$x^2\:+x\:-\:56=0$
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