7х в квадрате - 2х + (5+11х-6х в квадрате) 8ab+7b-(4ab+7b-3) 1-n+nв квадрате -(3n в квадрате -2n +5) -7n x в квадрате y +xy в квадрате -(3x в квадрате y - 2xy в квадрате - 7) +2x в квадрате y
Please note that the format is not quite clear for the last expression, but I did my best to interpret it accurately. Let me know if you need further assistance.
49x^2 - 2x + (5 + 11x - 6x^2) = 49x^2 - 2x + 5 + 11x - 6x^2 = 43x^2 + 9x + 5
8ab + 7b - (4ab + 7b - 3) = 8ab + 7b - 4ab - 7b + 3 = 4ab
1 - n + n^2 - (3n^2 - 2n + 5) = 1 - n + n^2 - 3n^2 + 2n - 5 = -2n^2 + n - 4
-7nx^2y + xy^2 - (3x^2y - 2xy^2 - 7) + 2x^2y = -7nx^2y + xy^2 - 3x^2y + 2xy^2 + 7 + 2x^2y = -7nx^2y + xy^2 - x^2y + 3xy^2 + 7
Please note that the format is not quite clear for the last expression, but I did my best to interpret it accurately. Let me know if you need further assistance.