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j in (-oo:+oo)
(280-108)/(13-115*9)-(0.25*108)-15+25 = j // - j
(280-108)/(13-115*9)-j-(0.25*108)-15+25 = 0
(280-108)/(13-115*9)-j-27-15+25 = 0
-j-8773/511 = 0 // + 8773/511
-j = 8773/511 // * -1
j = -8773/511
j = -8773/511
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