$$\int\frac{1}{x\sqrt{4x+9}}dx$$

$$x\frac{d}{dx}-y^2dy=0$$

$$\left(1+sen\left(x\right)\right)\frac{dy}{dx}=y\cdot cos\left(x\right)$$

$$1465.36\cdot8.92$$

$$x^2+5x+15=0$$

$$\int27e^{-3x}cos3xdx$$

$$\int\frac{5e^{2x}}{\sqrt{25-e^{4x}}}dx$$