$\frac{dy}{dx}x^2+y^2=9$

$\frac{dy}{dx}=\frac{x\left(lnx\right)}{\left(e^{3y}\right)}$

$\int\left(1-e^{-2}\right)dx$

$\left(\sqrt{2}+5x^2y^6z^9\right)^2$

$\frac{x^2-13x+39}{x-6}$

$42-9-35\cdot5$

$\:tan\:\left(x\right)=sec\:\left(x\right)-\frac{cos\left(x\right)}{sin\left(x\right)+1}$