872 / 2148 / 3105 * 6 = 872 / 2148 * 1 / 3105 * 6 = 872 / 358 * 1 / 3105 = 436 / 179 * 1 / 3105 = 436 / 555795 =~ 0.000784462
2b+3/4+b-1/2+3/4=2b+3/4+b-2/4+3/4=3b+4/4=3b+1
при b=-3; 3b+1=3*(-3)+1=-9+1=-8
0,3у²( -1/3 х⁴у⁶)= - 0,1х⁴у⁸
1 1/6 cd( - 6/7 c³d⁷)= - c⁴d⁸
ab*( - ab²) * ab³= - a³b⁶
25a⁴ (3а³)²=75а¹⁰
( -3b⁶)⁴ *b= - 81b²⁵
(- c²)³ 0.15c⁴= - 0.15 c¹⁰
<span>(0.2 m²n)³ * 1000m⁴n⁷=(0.2*10)³m¹⁰n¹⁰=8m¹⁰n¹⁰</span>