(5 1/84-(-31/63)-(2 31252+3 5/21))*(246(1 1/2:4 3/8)/(-7/156+1/39+1 15/26):(20 1/4:26) =5
1) 2 31/252+3 5/21=535/252+68/21=535/252+816/252=1351/252
2) 5 1/84-(-31/63)=421/84+31/63=1263/252+124/252=1387/252
3) 1387/252-1351/252=36/252=1/7
4) 1 1/2:4 3/8=3/2:35/8=3/2*8/35=12/35
5) 24:12/35=24*35/12=70
6) 1/70*70=10
7) 20 1/4:26=81/4*1/26=81/104
8) -7/156+1/39=-7/156+4/156=-3/156
9) -3/156+1 15/26=-3/156+41/26=-3/156+246/256=243/256
10) 243/156:81/104=243/156*104/81=12/6=2
11) 10:2=5