$\left(x\:+\:\frac{1}{2}\right)\left(x+\frac{1}{3}\right)$

$\sqrt[5]{-243m^5n^{15}}$

$\frac{9b^3}{11b^1}$

$13+70-98-30+11\cdot9-30:3$

$3^3-5^2+14x$

$nx^2-ny^2$

$\left(cos\left(x\right)+3x^2y\right)dx+\left(x^3-y^2\right)dy=0$