$$\frac{dy}{dx}=\frac{1}{2x+y}$$

$$\left(5x^{-2}-y\right)^4$$

$$\left(13x^4y^5-15w^2z^3\right)^2$$

$$\left(3x^5-9\right)^2$$

$$6x^2+7+2$$

$$\left(\:8.4\:.\:10^5\right)\:+\left(5.2\:.\:10^5\right)\:$$

$$\int e^{23x}\cos\left(3x\right)dx$$