$$\frac{dy}{dx}=3xy-3x$$

$$\frac{10x^3+10x}{5x}$$

$$tan\left(x\right).sen\left(x\right)=sen^2x.\:secx$$

$$\frac{1}{2}\left(5x-9\right)$$

$$\frac{\sin\left(\theta\right)}{\sin\left(\theta\right)-\cos\left(\theta\right)}=\frac{1}{1-\cot\left(\theta\right)}$$

$$\left(\frac{1}{2}+x\right)^4$$