$6\:+\:\left(-4+2\right)\:-\:\left(-3-1\right)$

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

$\frac{dy}{dx}=xe^{\left(-0.2x^2\right)}$

$\int-4x^{-2}dx$

$\frac{\cos\left(x\right)}{\cot\left(x\right)}+\tan\left(x\right)\:\left(\cos\:\left(x\right)\right)\:$

$1-sin^2-sin^2x\infty$

$\lim_{x\to0}\left(\frac{e^{5x}-1}{5x}\right)$