$\sqrt{3}\left(\sqrt{3}x-2\sqrt{3}y\ +3\sqrt{3}\right)-2\sqrt{2}\left(3\sqrt{2}x-3\sqrt{2}y-5\sqrt{2}\right)$  

35x - 5[4xy - 5x - 3(xy - 4x)]

(x - 5)(x + 2)

 $6x\ +\ \left[2x^2\left(3x\ +\ 5\right)-3x^2\left(2x\ -\ 4\right)\right]:\left(-\ 2x\right)$  

 $\left(-\ 2x\right)^5:\left(-2x\right)^3\cdot\left(2x\right)^2$  

 $2\left(5x^2-3\right)-3\left(x^2-2\right)$  

 $\left(2x\ +\ 3\right)\cdot\left[\left(x\ +\ 1\right)\left(x\ -\ 2\right)\ -\ \left(-5x^3\right):\left(-5x\right)\right]$  

 $\left(\sqrt{2}x\right)^2-2\left(x+3\right)\left(x-1\right)$  

$2x\left(5\sqrt{2}-4\sqrt{2}\right)+x\sqrt{6}\left(\frac{4}{\sqrt{2}}+\frac{6}{\sqrt{3}}\right)-x\sqrt{24}\left(\frac{4}{\sqrt{3}}-\frac{8}{\sqrt{2}}\right)$

 $2x\sqrt{\left(1-\sqrt{3}\right)^2}+x\sqrt{\left(\sqrt{3}-2\right)^2}+x\sqrt{\left(2\sqrt{3}-4\right)^2}-x\sqrt{\left(\sqrt{3}-4\right)^2}$  

 $\left(5x\ -\ 1\right)\left(x\ -\ 3\right)-\left(5x^4-2x^3+3x^2\right):\ x^2$  

Calculați E(2), știind că:

 $E=5\ -\ 2x^2$  

Determinați valoarea maximă a expresiei:

Calculați perimetrul unui pătrat, a cărui arie este egală cu

 $2x\cdot\left[\left(-2x\right)^2-\left(x+2\right)\left(x-3\right)\right]-6x\left(x^2-3\right)$