$-6+2\left[4-2\left(3-5\right)\right]-3$

$\int5\frac{\cos\left(3ln\left(x\right)\right)}{x}+3+50x^2dx$

$\left(cscx-1\right)\:\left(secx+tanx\right)$

$\frac{500}{\left(1+0.1\right)^2}$

$2f\:+\:3\:=\:7$

$2\left(1-x\right)-\frac{x}{4}-\frac{1}{4}<1+\frac{x}{2}$

$\int2x^2\left(7-x^3\right)^5dx$