Question

what is differentiation?
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Answer 1

Sachi , kyu kar bera lagya m hasu gi ? (bata diye) , Sachi tane t puri PhD kar rakhi h ladkiya p

Vase vo bhi karan tha ,khi na khi , par koi na ,

(kyuki tu sabhi ladkiya t flrt kar r h , jaya t )

Mention not^_^