$x2-3x^3$

$\lim_{x\to-\infty}\left(\frac{ln\left(x^4-3\right)}{13x+5}\right)$

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

$\int\frac{2x+3}{\left(x-2\right)\left(x+5\right)^2}dx$

$2x^5-4x^6$

$\left(\sqrt[4]{97-x}+\sqrt[4]{x}\right)^4$

$\sqrt[12]{z^{15}}$