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 Jul 27 accepted Order of a pole Jul 27 comment Order of a pole Ah nice, I understand. TransferFunctionPoles will give the solution multiple times in contrast to Solve. Thanks! Jul 27 comment Order of a pole This only gives me the poles, not the order... Jul 27 awarded Commentator Jul 27 comment Order of a pole Thanks! This works. As alternatives you mean Reduce? Jul 27 comment Order of a pole @Guesswhoitis. I really don't think it would be illuminating if I explicitly gave you this function. Also I just wanted to know if this was possible in general. Jul 27 comment Order of a pole Yes @JohnMcGee it is a rational function. Jul 27 asked Order of a pole Apr 28 comment Simplify does not simplify The terms cancel each other when you perform the Square root: Sqrt[(wb Z - w xiR^4 Zb)^2/xiR^4] = (wb Z - w xiR^4 Zb)/xiR^2. Apr 28 awarded Custodian Apr 28 awarded Editor Apr 28 revised Simplify does not simplify added 3 characters in body Apr 28 reviewed Approve Simplify does not simplify Apr 28 asked Simplify does not simplify Apr 28 comment Root: Simplifying symbolic expression Ok, I didn't realise this. It's just that I want to understand the output from for example Integrate[-((2 I \[Pi])/Sqrt[(r + A xiR - rb xiR^2)^2 - 4 (l xiR + w xiR^2 + Z) (wb - lb xiR + xiR^2 Zb)]),xiR] which gives an EllipticF[ArcSin[...]] from a gigantic expressions with a lot of Roots... I want to find the an expression for A wherefore this integral becomes zero but it's too complicated to understand so I wanted to simplify this integral... Apr 24 comment Root: Simplifying symbolic expression @BobHanlon OK, I hoped there was a simpler way, but thanks! Apr 24 comment Root: Simplifying symbolic expression @2012rcampion every variable is complex valued... Apr 24 asked Root: Simplifying symbolic expression May 8 awarded Notable Question Dec 6 awarded Popular Question