-2/3*6/7−y6/7-y6/7−y+2/7+y2/7+y2/7+y
= -2/3 6/7 + 2/3 y + 2/7 + y
= -12/21 + 2/3 * y + 2/7 + y
= -4/7 + 2/3 * y + 2/7 + y
= 2/32/32/3y + y + 2/3
= 2/3+12/3 + 12/3+1y + 2/3
= 5/35/35/3y + 2/3
Поэтому -2/3*6/7−y6/7-y6/7−y+2/7+y2/7+y2/7+y = 5/35/35/3y + 2/3 -4/7.
-2/3*6/7−y6/7-y6/7−y+2/7+y2/7+y2/7+y
= -2/3 6/7 + 2/3 y + 2/7 + y
= -12/21 + 2/3 * y + 2/7 + y
= -4/7 + 2/3 * y + 2/7 + y
= 2/32/32/3y + y + 2/3
= 2/3+12/3 + 12/3+1y + 2/3
= 5/35/35/3y + 2/3
Поэтому -2/3*6/7−y6/7-y6/7−y+2/7+y2/7+y2/7+y = 5/35/35/3y + 2/3 -4/7.