How to use and operator in rdlc reporting

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ASP.NET

MVC3

RDLC

reporting

I have an expression like below

=IIf((Previous(Fields!Shot_type.Value) = Fields!Shot_type.Value & Previous(Fields!JobShot.Value) = Fields!JobShot.Value), Nothing, Fields!Shot_type.Value)

I need to check the repetition of value with respect to Jobshot and shot_type if both value will match previous value then it will return nothing otherwise Shot_type.Value.

What I have tried:

=IIf((Previous(Fields!Shot_type.Value) = Fields!Shot_type.Value & Previous(Fields!JobShot.Value) = Fields!JobShot.Value), Nothing, Fields!Shot_type.Value)