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Article by Daniel Sitaru-Romania CRUX MATHEMATICORUM CHALLENGES-VIII 4689, 4704, 4724, 4726, 4740, 4756, 4809, 4819 B131, B135
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PP40300, PP40563 PP41711, PP41834, PP42153, PP43098, PP43109, PP43120, PP43121, PP44295, PP43140, PP43155, PP43022, PP43411, PP43492, PP43553, PP43630, PP43649, PP40232, PP40442 PP43507, PP44155, PP44167, PP44233, PP44234, PP44328, PP44186, PP44055, PP44056 PP40256, PP40254, PP40568, PP40569, PP40281, PP40298, PP40325, PP40292, PP40495 PP40423, PP40318, PP39991, PP40424, PP37343, PP40009, PP40441, PP37383, PP37384
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