$\left(2x-3\right)^2+\left(3x-2\right)^2-13\left(x^2-2x+1\right)$

$\int7x^7dx$

$\int\frac{1}{3x^2-x^4}dx$

$\lim_{x\to0}\left(\frac{x^2+7x+12}{x^2+x+2}\right)$

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

$sin\left[tan^{-1}\left(-6\right)\right]$

$cos\left(2\right)j\:+\:sin\:\left(2\right)j$