$\ln\frac{x^{2}}{3y}$

$3\left(\frac{4\sqrt{3}}{2\sqrt{3}}\right)\cdot\:\left(\frac{4\sqrt{3}}{\sqrt{\left(4\sqrt{3}\right)^2-\left(2\sqrt{3}\right)^2}}\right)^2$

$\int\left(x^2+2x\right)\:cos\left(x\right)dx$

$x^{2}+6\times9$

$\frac{dy}{dx}=8x^3+12x+3$

$\frac{1-\tan\left(x\right)}{\csc\left(x\right)-\sec\left(x\right)}$

$4\:\left(x\:+\:8\right)\:+\:9x$