- ( x + 1 ) + 2x + 4) =
3 (5x) - (2x - 3 )=
(7x +2y)² =
a-[b- (a - b )] - 6 =
4x (4 -3 × ) + 6 x + (2x + 1) =
2 a ² - (a +6 ) (2a - 1) =
Mógłby ktoś to zrobić ?