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In this paper, we define new classes of analytic functions using a general derivative operator which is a unification of the S˘ al˘ agean derivative operator, the Owa- Srivastava fractional calculus operator and the Al-Oboudi operator, and discuss some coefficient inequalities for functions belong to this classes.

Coefficient Inequalities for Certain Subclasses of Analytic Functions Defined by Using a General Derivative Operator