math
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3 defs 21 7 defs 26 5 defs 37 3 defs 18 6 defs 20 6 defs 19 6 defs 19 3 defs 22 6 defs 22 3 defs 23 2 defs 24 5 defs 25 5 defs 19 7 defs 27 5 defs 23 6 defs 17 5 defs 28 3 defs 19 5 defs 23 6 defs 16 3 defs 16 5 defs 21 4 defs 22 5 defs 26 5 defs 23 3 defs 19 7 defs 24 5 defs 27 3 defs 28 5 defs 28