Simplify: `1 div (3)/(7)` of `(6 + 8 xx bar(3 -2)) + [ ((1)/(5) - (7)/(25)) - {(3)/(7) + (8)/(14)}]`

Simplify: (6)/(5) xx (3)/(7) - (1)/( 5) xx (3)/(7)

Simplify: 7/8-1/3-1/4

Simplify : ((1)/(12) + ((-3)/( 4)) + (7)/(8)) xx (3 (2)/(5) - (7)/(10) + ((-2)/( 15)) - 10 (1)/(30))

(5)/(6) -: (6)/(7) xx ? - (8)/(9) -: 1 (2)/(5) -: (3)/(4) xx 3 (1)/(3) = 2(7)/(9)

Simplify : [ ((- 3 )/( 2) xx (4)/(5) ) + ((9)/(5) xx (-10)/( 3)) - ((1)/(2)xx (3)/(4)) ] div [ ((21)/( 9) xx (3)/(7)) +((7)/(8) xx (16)/(14)) ]

(49)^(2) xx (7)^(8) div (343)^(3) = (7)^(?)

The value of 3(1)/(3) div 2(1)/(2) of 1(3)/(5) + ((3)/(8) + (1)/(7) xx 1 (3)/(4)) is

(3)/(7)xx(9)/(14) div (5)/(7)=?

-(3)/(7)xx(6)/(5)+(1)/(10)xx(3)/(2)-(6)/(5)xx(1)/(14)