$3-4-2\cdot5-11-18$

$\int\left(\sin^2\left(\frac{x}{2}\right)\cos\left(\frac{x}{2}\right)\right)dx$

$18x^3-12x^2+8x$

$7\sin\:\theta\:+\sqrt{22}=0$

$arctan\left(tan\left(\frac{25\pi}{3}\right)\right)$

$\left(\ln\left(x\right)\right)^2-\left(\ln\left(x\right)\right)=0$

$\lim_{x\to\infty}\left(\frac{x^3}{\ln\left(x\right)}\right)$