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There have been 2 items by HaThuyHang (Search limited from 15-05-2020)

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	$y^{3}+3y^{2}+y+4x^{2}... in Phương trình, hệ phương trình và bất phương trình Started by HaThuyHang, 15-12-2015		4 replies 646 views	HaThuyHang 15-12-2015
	$\sqrt{2x+1}+\sqrt{3-2x}+4+2\sqrt{3+4... in Phương trình - hệ phương trình - bất phương trình Started by HaThuyHang, 14-12-2015		1 reply 390 views	nasho_god 14-12-2015