Вправи: 150

150. Спростіть вираз:

1) 9m225a2 • 35a318m5 = 9m2 • 35a325a2 • 18m5 = 7a10m3;

2) 7p318a3 • (–27a414p3) = –7p3 • 27a418a3 • 14p3 = –3a4;

3) –5m324n7 • 7n210m4 = –5m3 • 7n221n7 • 10m4 = –16n5m;

4) –118c3d4 • (–12c4d47) = 12c4d418c3d4 • 7 = 2c21.