Sum of all the coefficient of those terms in the expansion of `(a+b+c+d)^(8)` which contains b but not c

The sum of all the coefficients of the terms in the expansion of (x+y+z+w)^(6) which contain x but not y , is

The number of terms in the expansion if (a+b+c)^(12) is

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 number of terms in the expansion of (a+b+c)^(n).

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

The number of terms in the expansion of (a + b + c)^25 is -

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