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

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

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

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

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

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

coefficient of a^(3)b^(2)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

Find the coefficient of x^2 y^3 z^4 in the expansion of (ax -by +cz)^9 (b) 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

Find the coefficient of a^-6 b^4 in the expansion of (1/a-(2b)/3)^10 .