$\left(1-\frac{3}{4}\:xy\right)^2$

$\lim_{x\to\infty}\left(\frac{1}{e^{-x+e^x}}\right)$

$\csc^2\left(x\right)\left(1-cos^2x\right)=1$

$\frac{1}{1+\sec\left(x\right)}-\frac{1}{1-\sec\left(x\right)}=2\cot\left(x\right)\csc\left(x\right)$

$\left(a^2b^3c^2\right)^3$

$x\:dy\:+\:x^2\:dx\:=0,\:y\left(1\right)=0.2$

$2n^2-n-15=0$