$\lim_{x\to0}\left(\frac{\left(4e^{\left(6-2x\right)}-x^2\right)}{\left(x\right)}\right)$

$9x^6y^6-6x^3y^3z^3+z^6$

$\arcsin\left(\frac{35}{65}\right)$

$\left(-x^2-y^2\right)^4$

$\int_1^{\infty}\left(\frac{k}{5+k^2}\right)dx$

$\lim_{x\to-1}\left(\left(\frac{x^4+5x^2-6}{x\:^3-3x-4}\right)\right)$

$\left(3x^2+1\right)^5$