$4m^2-28m+36$

$\int\tan^5x\:\sec\:x^7\:dx$

$\int\left(\frac{2}{\left(x+2\right)\left(x-1\right)}\right)dx$

$\left(9\:\frac{1}{2}a^2b^3\right)\left(-\frac{2}{19}a^{10}b^{10}\right)$

$7z^2y-12zy^3$

$x^2=72$

$\frac{1-\cos\beta}{\sin\beta}=\frac{\sin\beta}{1+\cos\beta}$