math
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5 defs 29 2 defs 21 6 defs 20 3 defs 23 3 defs 17 5 defs 24 3 defs 21 5 defs 21 3 defs 18 5 defs 25 5 defs 21 6 defs 28 5 defs 27 6 defs 24 5 defs 29 6 defs 23 5 defs 21 7 defs 25 3 defs 18 5 defs 23 6 defs 22 7 defs 29 5 defs 21 3 defs 18 6 defs 23 6 defs 22 6 defs 22 3 defs 25 5 defs 17 3 defs 21