$$y^{\prime}+4y=20,y\left(0\right)=2$$

$$\int\left(-3x+2\right)^4dx$$

$$\frac{2}{\cos\left(2x\right)}$$

$$\frac{dy}{dx}\left(12sin\left(y\right)+2cos\left(2x\right)=13xy\right)$$

$$3x^2+4x=1$$

$$3-2\:x\:5\:+7\:x\:4$$

$$\lim_{x\to0}\left(\frac{\ln\left(2-\cos\left(x\right)^2\right)}{\left(\sin\left(x\right)+\tan\left(x\right)\right)^2}\right)$$