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

$\int_0^{\frac{\pi}{40}}\left(sec\left(20x\right)tan\left(20x\right)\right)dx$

$\left(2xy\:-\:5y^2\right)^3$

$-5-x>0$

$\frac{dy}{dx}\left(2x^2y^3+\cos\left(4y\right)+3e^{2y}=5\right)$

$\frac{16}{4}+\frac{12}{3}+6$

$sin\left(x\right)xcot\left(x\right)=cos\left(x\right)$