$\left(\frac{2}{x^2y}+\frac{ab^2}{3}\right)^2$

$-3\cdot\frac{1}{3}+2$

$\frac{1}{4}x+\frac{3}{4}x-\frac{2}{5}x=x-540$

$\lim_{x\to0}\left(\frac{5x+8x^2}{3x^4-16x^2}\right)$

$\int\left(1-2x\right)^2\:x\:dx$

$\:\frac{3x+2}{5}\:<x-4$

$f\left(3\right)=\left(3+3\right)\left(3-4\right)$