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Inequation - Wikipedia
不等式的英文究竟是inequality还是inequation? - 知乎
Solving Inequalities - Math is Fun
inequation - 百度百科
Inequalities Calculator - Symbolab
Inequation -- from Wolfram MathWorld
Inequalities - Meaning, Calculate, Solving, Graphing Inequalities
Unit 3: Linear equations and inequalities - Khan Academy
2: Equations and Inequalities - Mathematics LibreTexts
2.7: Introduction to Inequalities and Interval Notation