$\frac{1-\sin\left(x\right)}{\cos\left(x\right)}=\frac{1+\sin\left(x\right)}{\cos\left(x\right)}$

$x\:=x\sin\left(x\right)$

$\frac{3m}{2}\left(\frac{2m}{7}+\frac{7n}{5}\right)-\frac{5n}{3}\left(3+\frac{3m}{2}\right)$

$\left|1111\right|$

$3x^3+9x^2+6x$

$17\:+\:5\:+\:-3\:+\:-72\:+\:-28$

$\int\:\:\left(3x^3+5\right)^5\cdot\:27x^2dx$