$\int\frac{1}{t^4-a^4}dx$

$\int tan\left(\frac{x}{2}\right)dx$

$\frac{d^n}{dx^n}\left(\cos\left(2x\right)\right)$

$\frac{2}{5}x^2\frac{3}{8}y^2+\frac{1}{10}x^2-\frac{1}{2}y^2$

$\lim_{x\to\infty}\left(\frac{32x^6-8}{4x^6-7x^5}\right)$

$x^4+8x^2+9$

$\left(2a-3\right)\left(2a+3\right)$