math
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5 defs 18 5 defs 23 6 defs 18 5 defs 22 6 defs 30 3 defs 15 6 defs 15 5 defs 13 2 defs 16 5 defs 21 6 defs 22 6 defs 21 5 defs 17 3 defs 18 2 defs 19 5 defs 16 6 defs 22 6 defs 23 3 defs 23 3 defs 19 7 defs 26 6 defs 16 6 defs 24 6 defs 24 6 defs 31 3 defs 22 6 defs 24 5 defs 18 6 defs 18 6 defs 20