$$\sin^2x-6\sin\left(x\right)+4=0$$

$$9x^6+1,2x^3+0,04$$

$$2\left(4\right)+2\left(2\right)$$

$$y ^ { 2 } = - 7 c z - 3$$

$$-3x\left(x^2-4x+6\right)$$

$$4m^2-20am$$

$$\lim_{x\to n}\left(\frac{x+4n}{x^2}\right)$$