$9-11+\left(-9\right)-\left(-2\right)-\left(-2\right)$

$\frac{dy}{dx}=2x\left(1-y\right)\:y\left(0\right)=0$

$\frac{x^{3\:}+4}{x^2+4}$

$4^5.4^2$

$\frac{1}{2}a^3b-2a^2b^2+\frac{1}{3}ab^3+4;\:a=2;\:y\:b=-1$

$\:\int sin\:4\:\left(2x\right)dx$

$\int\frac{1}{\left(x+3\right)^2-25}dx$