$\sqrt{\left(3+\sqrt{2}\right)}\cdot\sqrt{\left(3-\sqrt{2}\right)}$

$\frac{sin\left(x-y\right)}{\sin\left(x\right)\cos\left(y\right)}=1-tan\left(y\right)cot\left(x\right)$

$\frac{\sin^2\left(y\right)}{\cos\left(y\right)}+\cos\left(y\right)=\sec\left(y\right)$

$10x^2-x-3$

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

$12-0,85$

$\frac{2x^5+31x^3-22x^2+65x-55}{2x^2+5}$