15 ÷ 3 x 8 + 1 +7 x 10 - 11 x 5=
15 - 8 - ( 2 x 1 ) + 5 x ( 4 +12 )=
(30 + 4) ÷ (5 x 4 - 3) + (10 + 4) =
4 x [25 + 5 ÷(4 + 1)] - (3 ÷ 3) =
[25 + 3 x (5 x 3)] ÷ (12 - 2)=
56
103
16
7
85
