$$4x\:+\:4=5x+3$$

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

$$\left(2\sin\left(f\right)-\sqrt{3}\right)\left(\cos\left(f\right)+1\right)=0$$

$$\frac{d}{dx}\left(\ln\left(x^2\right)+\left(ln\left(x\right)^3\right)\right)$$

$$\:\:6x^3-11x^2+4x$$

$$\left(-x^2+a^2\right)\left(x^2+a^2\right)$$

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