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Start Over You searched for: Title al-Maʻūnah fī ʻilm al-ḥisāb ✖ Remove constraint Title: al-Maʻūnah fī ʻilm al-ḥisāb Author Ahmad Ibn-Muhammad Ibn-al-Haʾim ✖ Remove constraint Author: Ahmad Ibn-Muhammad Ibn-al-Haʾim Century 15th century ✖ Remove constraint Century: 15th century