$$\int-4sen\left(2x-\frac{\pi}{2}\right)\:dx$$

$$\frac{dy}{dx}\left(x^7lnx-\frac{1}{6}x^6\right)$$

$$\int\left(10e^{-5x}\right)dx$$

$$2\sin y=-1$$

$$-7\left(-3x-7\right)=42x+49$$

$$-\left(58+233\right)$$

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