$\int\frac{2x^2+3x+1}{x\left(x^2-6x+5x\right)}dx$

$\tan\left(x\right)\tan\left(b\right)\left(\cot\left(x\right)+\cot\left(b\right)\right)$

$\frac{\left(x+2y\right)^2+\left(x-2y\right)^2}{x^2+4y^2}$

$\left(5x^3y^5-12z^2\right)^2$

$8\cos^2\left(30\right)-6\cos\left(60\right)+1$

$\lim_{x\to infinity}\left(\frac{2^t+3^t}{5}\right)^{\frac{1}{t}}$

$\int xn^xdx$