46. 27x + 9y + 4x -4x-5
27x + 4x - 4x + 9y - 5
27x + 9y - 5
47. 10 a3b2 + 21a2b3-11+11
31a³b²
48. x3 + x*y2 -- 2xy + (-2xy) + x
x³ + x*y² - 4xy + x
49. 6m + 9 + 1m + 3-16m -9
6m + m - 16m + 9 + 3 - 9
-9m + 3
50. 62-7b +7 + b2 -17b +13-b-13 Х
7b - 17b - b + 62 + 7 + 13 - 13 + b²
-11b + 69 + b²
b² - 11b + 69
You're making a progress, good luck!
