`56/(1/3 {15+12-(9+6-bar(5+7))})=`

Solve the following: 72 div 1/2 {15 + 12-(9 + 6- bar (5+7))} =?

Simplify : 6/35 of [1\ 1/4 -: {1/2+(6/7-:bar(1/4+5/12))}]

21 1/9 -: [5/9 of { 3 1/(27) -(6-bar(1/3-1/6))}]

1.bar(5)+2.bar(6)+3.bar(7)=

Simplify : 14-[12-{9-(7-bar(6-2))}]

The distance (in km) of 40 engineers from their residence to their place of work were found as follows: 5 3 10 20 25 11 13 7 12 31 19 10 12 17 18 11 32 17 16 2 7 9 7 8 3 5 12 15 18 3 12 14 2 9 6 15 15 7 6 12 What is the empirical probability that an engineer lives: within 1/2 km from her place of work?

Simplify 6-[9-{18-(15-bar(12-9))}]

The value of: [(5/7 " of " 1 (3)/(8) " of " 6/7)] div [1-(1)/(7) xx ( 5/12 +(1)/(3)) ] xx ((1)/(7) -(1)/(9))/((1)/(7) +(1)/(9))