1). -2,1·(-2,1)·(-2,1) = (-2,1)³
2). b·b·b·b·b·b·....·b·b= b⁵¹
3). (-3x)(-3x)(-3x)(-3x)(-3x)=(-3x)⁵
4). (5/y)·(5/y)·(5/y)·(5/y) = (5/y)⁴
<span>(704-349)+Х=634
355+х=634
х=634-355
х=279
Х-(425-164)=525
х-261=525
х=525+261
х=786
(800:100)×Х=592
8*х=592
х=592/8
х=74
Х:(14×5)=19</span>
х/70=19
х=19*70
х=1330
-7m(3-7)-2,5(3-m)-2m=-21m+49m-7,5+2,5m-2m=28,5m-7,5