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d) (4x-y) - 2(x+y) = 4x - y -2x -2y = 2x -3y
e) 2(3x-2y+3z) - 5(x-y-z) = 6x -4y +6z -5x + 5y + 5z = x+y+11z
f) 4x(x-y-z) - 2x(4x-y+z) = 4x^ -4xy -4xz -8x^ + 2xy - 2xz =
-2xy - 4x^ -6xz
g) -3x^ (x- 2/3y) + 5x(x^-7xy) = -3x^ * x - 3x^ * 2/3y + 5x*x*x -35yx^ = -3x^ * x - 2x/y + 5x*x*x - 35yx^
h) -2 |2 (a+|2b) - 4(a|2- 2b) = -2|2a+4b) - 4a|2a+4b| = -8a|2a+4b|
Proszę bardzo :D