Find the value of `.^9 C_2`

Find the value of .^9 C_3

Find the value of .^9 C_6

Find the value of .^12 C_2

Find the value of .^10 C_2

Find the value of .^5 C_2

Find the value of .^9P_4

Find the values of .^(9)C_(7)

Find the value of .^(20)C_(0) xx .^(13)C_(10) - .^(20)C_(1) xx .^(12)C_(9) + .^(20)C_(2) xx .^(11)C_(8) - "……" + .^(20)C_(10) .

Find the value of (.^(10)C_(10))+(.^(10)C_(0)+.^(10)C_(1))+(.^(10)C_(0)+.^(10)C_(1)+.^(10)C_(2))+"...."+(.^(10)C_(0)+.^(10)C_(1)+.^(10)C_(2)+"....." + .^(10)C_(9)) .

Find the value of 4C_1 - 2C_2