math
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5 defs 15 5 defs 29 3 defs 15 3 defs 18 5 defs 19 6 defs 17 3 defs 19 6 defs 16 6 defs 20 6 defs 14 7 defs 20 5 defs 19 3 defs 14 3 defs 18 3 defs 22 3 defs 19 3 defs 15 6 defs 19 5 defs 22 3 defs 18 6 defs 13 3 defs 15 6 defs 15 7 defs 21 3 defs 19 5 defs 14 3 defs 15 7 defs 26 6 defs 18 3 defs 12