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d in (-oo:+oo)
d-9 = -10 // + 10
d-9+10 = 0
d+1 = 0 // - 1
d = -1
d = -1
| 10+d=16 | | b+10=18 | | 4=k-7 | | 2=b-8 | | -7+t=-9 | | w+8=19 | | d+3=-4 | | 7+w=8 | | k+2=4 | | 7+m=2 | | -3=d-5 | | -10+d=-2 | | w+9=8 | | 5+k=14 | | 0=m+8 | | 8+d=19 | | -2b=-4 | | n-4=-3 | | 2k=-2 | | -9+b=2 | | -4b=-40 | | 9=k+6 | | -10=w-1 | | -6m=-6 | | 0=a-3 | | -7+n=-2 | | 6=w+5 | | 5+t=3 | | m+9=-3 | | (2*12)10+4-6= | | n+6=18 | | b/-7=6 |