$\frac{x+34}{\left(x-6\right)\left(x+2\right)}$

$a^2.8^7$

$\lim_{x\to\frac{1}{2}}\left(\left(1-2x\right)\left(tan\left(\left(\pi\right)\left(x\right)\right)\right)\right)$

$\int_4^6\left(\frac{3x^3-4x}{x^4-16}\right)dx$

$\frac{x\left[x\left(2x^2+3\right)+a\right]+b}{2x^2+2x+3}$

$\frac{x^3+4x^2-6x+12}{x-2}$

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