`7(1)/(3)-:(2)/(3)" of "2(1)/(5)+1(3)/(8)-:2(3)/(4)-1(1)/(2)`

2(4)/(5)-1(3)/(8)+3(1)/(2)=?

(7)/(8)-:(7(1)/(2)-5(1)/(6)-:2(3)/(4))+4(1)/(2)

7(1)/(2)+(1)/(2)+(1)/(2) of (1)/(4)-(2)/(5)xx2(1)/(3)-:1(1)/(8) of (1(2)/(5)-1(1)/(3))

7(1)/(2)-((8)/(11)xx7(1)/(3))-:(3(1)/(2)-2(1)/(4))

2 (4)/(5) - 1 (3)/(8) + 3 (1)/(2) = ?

If the expression 2(1)/(2) of (3)/(4)xx(1)/(2)-:(3)/(2)+(1)/(2)-:(3)/(2)[(2)/(3)-(1)/(2) of (2)/(3)] is simplified,we get (a) (1)/(2) (b) (7)/(8)(c)1(5)/(8) (d) 2(3)/(5)

If A=[(2)/(3)1(5)/(3)(1)/(3)(2)/(3)(4)/(3)(7)/(3)2(2)/(3)] and B=[(2)/(3)(2)/(5)1(1)/(5)(2)/(5)(4)/(5)(4)/(5)(7)/(3)(6)/(5)(2)/(5)], then compute 3A_(-)=5B

(1)/(2)+(3)/(2).(1)/(4)+(5)/(3).(1)/(8)+(7)/(4).(1)/(16)+....=