Notation doubt: Is $\nabla f(x(u,v), y(u,v))$ the same as $\nabla f(u, v)$?

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Is $\nabla f(x(u,v), y(u,v))$ the same as $\nabla f(u, v)$?

Background: Was solving this assignment, problem E-7.

Kinda confused here, would appreciate help.