$3\left(m^2ny^9\right)^{20}$

$x^2\:-\:ky^2\:=\:2$

$\int te^{t^2}sin\left(e^{t^2}\right)dt$

$\lim_{x\to0}\left(-7\right)$

$\int\frac{x^2+4x-5}{\left(x^3\right)}dx$

$35xy^2+15x^3y\:$

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