Find the value of `(6^7-6^9)/6^5`

Find the value of- 6/7-(-5/7)

Find the value of : (-6/7) ^5 times (-2/6 )^6

Find the value of: (9!+6(5!) )/(5!-20)

Find the value of x if 6:9=x:6

Find the value of (6^((2)/(3))xx(6^(7))^((1)/(3)))/((6^(6))^((1)/(3)))

Find the value of 9 + | - 6 |

Find the value of : -6/9 - ( -2/7 )

Find the value of .^(6)C_(2)+.^(6)C_(3)+.^(7)C_(4)+.^(0)C_(5)+.^(9)C_(6) .

if U = {1, 2, 3, 4, 5, 6, 7, 8, 9}, B = { 2, 4, 6, 8} and C = {3, 4, 5, 6} then find the value of (B - C)'.

If U = {1, 2, 3, 4, 5, 6, 7, 8, 9}, B = { 2, 4, 6, 8} and C = {3, 4, 5, 6} then find the value of (B -C)' .