$\frac{\left(ab^3\right)^2}{\left(a^2b^3\right)}.\frac{\left(a^2b^3\right)^2}{\left(b^3\right)^2}$

$y'\:=\:\frac{2}{3}x\sqrt{1-9y^2}$

$\int\frac{2.e^{2x}+3.e^x}{e^{2x}+2}dx$

$\sqrt{\frac{\sqrt[6]{x}-\sqrt[2]{y}}{\sqrt[4]{\left(\frac{x+y}{2}\right)^2}}}$

$\left(1-\sec\left(x\right)\right)\left(1-\cos\left(x\right)\right)$

$x^2=02$