$\left(m+4\right)\left(m-4\right)\left(m+7\right)\left(m-3\right)$

$x\frac{dv}{dx}=vln\left(v\right)-v$

$x-5<2x-6$

$x^2+2<1-2x$

$7-\left(-9\right)-18+\left(-19\right)+18$

$\frac{1-\tan^{2}\alpha}{1+\tan^{2}\alpha}=\cos^{2}\alpha-\sen^{2}\alpha$

$\frac{1}{3}\left(12u-3\right)$