$\frac{1}{sin\:2x}$

$\frac{dn}{dt}+n=nte^{t+5}$

$\lim_{x\to\sqrt{3}}\frac{x^3-3\sqrt{3}}{\sqrt{1-\cos\left(2x-2\sqrt{3}\right)}}$

$\int\left(2x^7\left(\sqrt{7x^8+25}\right)\right)dx$

$\sin\left(x-\frac{\pi}{2}\right)=0$

$x+3\left(x+2\right)=18$

$\left(\frac{1}{2}mn^2y^7\right)^6$