Reduceți termenii asemenea:
a) 5x + (- 4x + 2y) - (5x – 7y) - (9y + 3x);
b) y2 – 2y +3 - (3y-1 + y2) + (1 + 5y);
c) - 2 x2y + 2xy2 + 3 V2 x?y - 2xy2;
d) (0,1x + 0,7x2 - 0,3) + (0,3x2 + 0,9x + 1,3);
e) (32 x-273y + 16)-(V18 x - 112 y).