$\left(8m^2-7n\right)^2$

$4v^2\cdot3vu^4$

$\lim_{x\to1}\left(1-x\right)\left(\tan\left(\frac{\pi}{2}x\right)\right)$

$\left(3+x\right)\left(3-x\right)^2$

$\left(3x^2+8y^2\right)dx+\left(16xy+15y^2\right)dy=0$

$1-\frac{\tan^2\left(x\right)}{1+\tan^2\left(x\right)}=\cos^2\left(x\right)$

$\frac{a}{a-b}+\frac{b}{a-b}$