Решите 4 5 6 ....................
C(4-9ck) 2m^4.2 n^2.m^4 /2 m^(8+4)n^2 m^12n^2 3x(a-b) - 4y(a-b) a-b = 8-1=1 3(-5) - 4.3=-15.12=-3