math
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4 defs 22 7 defs 13 5 defs 12 6 defs 22 3 defs 20 5 defs 19 6 defs 20 3 defs 17 5 defs 21 5 defs 15 7 defs 25 5 defs 19 5 defs 23 5 defs 19 3 defs 20 3 defs 22 3 defs 16 3 defs 22 3 defs 23 3 defs 20 6 defs 19 5 defs 21 5 defs 21 5 defs 19 7 defs 24 5 defs 17 6 defs 20 5 defs 18 5 defs 20 5 defs 24