Question

64/4+(68-40)/2=
68/(4+64)*1=
(77-42)/7-1=
6*(15-12)/2=

Answer 1

1)=30
2)=1
3)=5.8  
4) =9  

Answer 2

64/4+(68-40)/2=16+14=30
68/(4+64)*1=68/68=1
(77-42)/7-1=5-1=4
6*(15-12)/2=18/2=9