$\frac{3x^3+1}{x^2}$

$\lim_{x\to\infty}\left(\frac{\tan^2w-1}{\tan^2w+1}\right)$

$\left(3x\right)-\left(4y\right)^2$

$x^3-4x^2+2x-5\left(-8x^4+5x^2-10x-15\right)$

$\ln\left(x\right)\frac{dx}{dy}=\frac{x}{y}$

$\frac{m^4n^4}{3m^4n^2}$

$\sqrt[3]{\frac{27x^3y^2}{7x^5y}}$