$n\:=\left(5x+1\right)^2+5\left(x-1\right)^2$

$\cos\left(\frac{5\pi}{4}+\frac{2\pi}{3}\right)$

$5\log\left(x\right)-4\log\left(x^2+1\right)+5\log\left(x+1\right)$

$\left(3a^2-5x\right)^3$

$\frac{x^4+11x^3+33x+24x+32}{x+6}$

$\left(10a+4b\right)\left(10a-6b\right)$

$\lim_{x\to0}\left(\frac{3e^{3x}-3}{x^3}\right)$