The value of` (8!-7!)/(6!)`

The value for (-7)^(6)-:7^(6) is _________.

The value of (1)/(3)-:(6)/(7)-:(6)/(3)+(8)/(9)-(2)/(3)times(4)/(3) is:

The value of [-7.8] is

Find the value of : (-7)^(2xx7-6-8)

In the expansion of (1+x)^(n),7 th and 8th terms are equal.Find the value of (7/x+6)^(2)

The value of (1)/( sqrt(7) - sqrt(6)) - (1)/( sqrt(6) - sqrt(5) ) +(1)/( sqrt(5) -2) - (1)/( sqrt(8) - sqrt(7) ) +(1)/( 3- sqrt(8)) is

The value of (1)/(sqrt(4)+sqrt(5))+(1)/(sqrt(5)+sqrt(6))+(1)/(sqrt(6)+sqrt(7))+(1)/(sqrt(7)+sqrt(8))+(1)/(sqrt(8)+sqrt(9)) is

The value of (.^(7)C_(0)+.^(7)C_(1))+(.^(7)C_(1)+.^(7)C_(2))+(.^(7)C_(6)+.^(7)C_(7)) is (A)2^(7)-1(B)2^(8)-2(C)2^(8)-1(D)2^(8)