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เปิด Google ค้นคำ math ก็มีอะไรให้อ่าน
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Mathematics (from Greek ฮผฮฌฮธฮทฮผฮฑ mรกthฤ“ma, "knowledge, study, learning") is
the study of such topics as quantity,[1] structure,[2] space,[1] and change.[3][4][5]

It has no generally accepted definition.[6][7]