$$\frac{\left(-\infty\right)}{\left(-\infty\right)^2}+2$$

$$\sec^2x=3\tan x-1$$

$$y'=3y-2$$

$$3-2\left(3-1+-4\right)$$

$$-2x.4x^4.-x^n.x^{-2}\:$$

$$2\sin\left(x\right)\tan\left(x\right)-\sin\left(x\right)=0$$

$$\frac{dy}{dx}+4y=x^5$$