$\sec x-\cot x$

$\lim_{x\to\infty}\left(\left(1+\frac{3}{x}\right)^{\sqrt{x}}\right)$

$\left(\frac{3}{4}x^2y^3\right)^3\left(\frac{3}{16x^5}\right)^2$

$\left(x^2+3\right)\left(x-3\right)\left(x+4\right)$

$\left(3\right)^2+8-10\left(-2\right)$

$3\cos\left(\pi x\right)=2$

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