Find the coefficient of `a^3b^4c^5` in the expansion of `(b c+c a+a b)^6dot`

Find the coefficient of a^(3) b^(4)c^(5) in the expasion of (bc + ca + ab)^(6)

Coefficient of a^3b^4c^5 in expansion of (bc+ca+ab)^6

Find the coefficient of a^(3)b^(4)c in the expansion of (1+a-b+c)^(9)

The coefficient of a^(3)b^(2)c in the expansion of (1+a-b+c)^(9) is

coefficient of a^(3)b^(2)c in the expansion of (1+a-b+c)^(9)

Find the coefficient of a^(2)b^(3)c^(4)d in the expansion of (a-b-c+d)^(10) .

Find the coefficient of x^2 y^3 z^4 in the expansion of (ax -by +cx)^9 (b) a^2 b^3 c^4 d in the expansion of (a -b-c +d)^10

The coefficient of a^(8)b^(6)c^(4) in the expansion of (a+b+c)^(18) is

Find the greatest coefficient in the expansion of (a + b + c+ d)^(15) .