Упростить выражение: 1). -2(3x-2y)-5(2y-3x) 2). (x² -1)3x -(x² -2)2x 3). 2(3а2 - 4а +8) (За-5в+вс)(-3) 4). 5). (9 - a)(8 + а-в) 6). (4a – 5c)(-a + 3c) 7). (3-c)(8+y)+(c-4)(y+6) 8). (5-x)(x+5)+(x-3)2 9). (x-5)2 - (x-3)(x-7) 10). (2х-3)2 -2x(4+2x)​
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