если сравнить первый и последний столбики, то 5.
2p- 14p²/7p+3= 14p²+6p-14p²/7p+3=6p/7p+3
2b²-b/b³+1-b-1/b²-b+1= b(2b-1)/(b+1)(b²-b+1)-b-1/b²-b+1=b(2b-1)-b²+1/(b+1)(b²-b+1)=2b²-b-b²+1/(b+1)(b²-b+1)=b²-b+1/(b-1)(b²-b+1)=1/b+1
(-0,2)^-3=-125, (0,5)^-3=8
(-3)^-3=0,037037037037037.....
(-3)^3=27
<span> (u−2)(5u+1)(3u−5)
(5mu+u-10m-2)(3u-5)
15mu</span>²-25mu+3u²-5u-30mu+50m-6u+10
15mu²-55mu+3u²-11u+50m+10