Выражения (2а+3)*(а+3)-2а*(4-ba) (2x+3)(3--5)^2-10x -36c-3(5-6c)^2 (7b-1)(1-7b)-b(4-3b) (2k-3)(3+-5)^2-30k

(2a+3)(a+3)-2a(4-ba)
2a²+6a+3a+9-8a+2a²b
2a²+a+9+2a²b
2a²b+2a²+a+9

(2x+3)(3-2x)-(2x-5)²-10x
(3+2x)(3-2x)-(2x-5)²-10x
9-4x²-4x²-20x+25-10x
34-8x²-30x
-8x²-30x+34

-36c-3(5-6c)²
-36c-3*25-60c+36c²
-36c-75-60c+36c²
-96c-75+36c²
36c²-96c-75

(7b-1)(1-7b)-b(4-3b)
7b-49b²-1+7b-4b+3b²
10b-46b²-1
-46b²+10b-1

(2k-3)(3+2k)-(3k-5)²-30k
(2k-3)(2k+3)-(3k-5)²-30k
4k²-9-9k²-30k+25-30k
-5k²+16-60k
-5k²-60k+16