$\frac{-5x^3-20x^2-15x-10}{x+3}$

$\sqrt{-64}$

$\lim_{x\to0}\left(\frac{tan\left(2x\right)}{tan\left(3x\right)}\right)$

$-34x^4y^5z^3\:+\:51x^3y^3z^3\:-\:85x^3y^2z^3$

$x\sqrt{4-y^2}dx+\sqrt{x^2+3}dy=0$

$\int_6^{6x^2}\left(\frac{3t^4}{\sqrt{t-4}}\right)dt$

$\int\frac{\sqrt{1+inx}}{x}dx$