খন্দকার শাহীন মওলা, সহকারী অধ্যাপক (গণিত),শ্রেণীঃ একাদশ,গণিতঃ১ম পত্র,অধ্যায়-ত্রিকো(৬.২),লেকচারঃ১১৬

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