math nightmare
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6 defs 66 3 defs 74 4 defs 91 3 defs 147 6 defs 114 5 defs 94 4 defs 50 6 defs 165 3 defs 80 6 defs 169 2 defs 143 7 defs 134 5 defs 83 3 defs 71 3 defs 136 5 defs 72 5 defs 153 5 defs 83 6 defs 129 2 defs 86 3 defs 48 5 defs 110 3 defs 103 3 defs 40 5 defs 68 5 defs 86 5 defs 139 6 defs 65 3 defs 43 4 defs 87