math
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3 defs 10 5 defs 14 6 defs 17 5 defs 11 5 defs 15 4 defs 18 5 defs 13 3 defs 18 5 defs 13 5 defs 11 6 defs 17 3 defs 16 6 defs 16 7 defs 15 5 defs 18 7 defs 22 3 defs 16 6 defs 19 5 defs 21 5 defs 15 5 defs 16 5 defs 30 6 defs 23 6 defs 22 6 defs 14 6 defs 17 5 defs 15 6 defs 17 6 defs 15 6 defs 16