Prove that if |x|>|y| then x^2>y^2
x= $\sqrt{\x}$ +7
(9x^4)^3
Prove that the angle between vector [+2; and L deg + j + 3k is arcsin(sqrt(46/55)) .
$$\int_{\Box}^{\Box}(\Box) d\Box$$
(15x+5)/5
2660/87
(15x+5)/3
6 $^{n}$ +20n-1