The value of `(7^(-1)-8^(-1))^(-1)-(3^(-1)-4^(-1))^(-1)` is

The value of 4^(-1)-8^(-1)

The value of [(1)/(3)]^(-1)-((1)/(4))^(-7)}+[((1)/(4))^(-1)-((1)/(5))^(-1)]+[((1)/(5))^(-1)-((1)/(6))^(-1)]^(2)] is

The value of 7^((1)/(2)).8^((1)/(2)) is

Find the value of : (i) ((5)/(8))^(-1)" "(ii)((-4)/(9))^(-1)" "(iii) (-7)^(-1) " " (iv)((1)/(-3))^(-1)

The value of "tan"^(-1)(1)/(2)+"tan"^(-1)(1)/(3)+"tan"^(-1)(7)/(8) is

Evaluate {((1)/(3))^(-1)-((1)/(4))^(-1)}^(-1) (ii) ((5)/(8))^(-7)xx((8)/(5))^(-4)