contourplot arg((tan(x+y i)^ln(sin(x+y i))-ln(cot(x+y i))^cos(x+y i ))),-4<x<4,-4<y<4contourplot arg((tan(x+y i)^ln(sin(x+y i))-ln(cot(x+y i))^cos(x+y i ))),-4<x<4,-4<y<4

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