math
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6 defs 18 6 defs 23 5 defs 18 5 defs 23 6 defs 18 5 defs 17 3 defs 19 5 defs 21 3 defs 19 6 defs 27 6 defs 17 3 defs 17 3 defs 17 3 defs 14 5 defs 17 5 defs 16 5 defs 17 3 defs 19 5 defs 17 5 defs 17 5 defs 18 6 defs 19 6 defs 19 3 defs 14 3 defs 18 3 defs 17 6 defs 17 5 defs 24 6 defs 22 3 defs 19