$$5x-2+1-3x+2$$

$$\left(-3\right)\left(-2x+4y-3\right)$$

$$f\left(x\right)=x^2+7x+6$$

$$tan\theta\:\:sen\theta\:$$

$$\left|123^2322\sqrt{2}\right|^2$$

$$36x^2-13x+1$$

$$\log_{25}\left(x^2\right)+\log_{25}\left(25-4x\right)$$