$$\left(3x-7x+5\right)\cdot\left(x-x+1\right)$$

$$\frac{dy}{dx}\left(\frac{\left(2x+4\right)^3x^x}{\left(x^2+1\right)^2}\right)$$

$$1,05-1,3$$

$$-\frac{1}{2}n^2+18=0$$

$$9+2\left(2x-3\right)$$

$$4.95-24.95$$

$$x^2y^2-2x^2yz^2+x^2z^2$$