$\int3\tan^2\left(x\right)dx$

$\frac{\sqrt{a}}{\sqrt{b}}+\frac{\sqrt{b}}{\sqrt{a}}$

$2yx^3\left(xy^{-4}\right)$

$49x^2+112x+64$

$\left(5\right)^3+8\left(-9\right)$

$52.7+46.7$

$\lim_{x\to infinity}\left(\frac{\sin\left(2x\right)\cos\left(e^{x^2+9}\right)}{x^2+9}\right)$