1210-936-136+2536-877+952-952-400= 1397
16:4x3x12:6:4x5= 30
25x25:5:5x6:3x10= 500
12x15:18x100:4:50x3= 15
15+3x(4x3-45:9)-16= 15+3x7-16= 20
25x(160-30x5)-8-(24+6:6)= 25x10-8-25= 217
(600-393)x350-87x(29743:49)= 207x350-87x607= 72450-52809= 19641
830-(820:4:5+59)x8= 830-100x8= 830-800= 30
1000-(241x4-64):100= 1000-900:100= 1000-9= 991