$x^2+\frac{2}{y}$

$\left(xy^3-y^2\right)^2$

$12x\left(\left(2x^2+1\right)^2\right)\cdot\left(\frac{\left(x\right)}{\left(\left(x^2-1\right)\right)}\right)$

$5\log x-4\log\left(x^2+1\right)+2\log\left(x-1\right)$

$2\left(4x^4-9x^2+8x-12\right)$

$m^2+3m+12$

$\int_0^{\infty}\left(\frac{1}{x+1}\right)dx$