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

$\frac{d}{dx}x^{\cos\left(4x\right)}$

$\left(2x^{\left(2\right)}+y^{\left(3\right)}\right)\left(2x-y^{\left(3\right)}\right)$

$\int_0^x\left(x\left(x-y\right)\right)dy$

$\left(2x+6\right)\cdot\left(-2\right)$

$\frac{\left(\frac{\left(2\right)}{a+2}-\frac{\left(3\right)}{a\left(a+2\right)}\right)}{2-\left(\frac{3}{a}\right)}$

$1^{\frac{-1}{3}}$