math
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5 defs 21 5 defs 30 5 defs 29 5 defs 24 2 defs 22 5 defs 22 6 defs 23 6 defs 25 6 defs 30 5 defs 21 3 defs 23 7 defs 34 6 defs 20 5 defs 35 5 defs 23 6 defs 31 4 defs 23 5 defs 22 7 defs 38 5 defs 24 3 defs 28 6 defs 19 6 defs 28 5 defs 26 5 defs 26 3 defs 23 5 defs 28 6 defs 33 7 defs 24 3 defs 26