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 Jun 26 awarded Nice Question Apr 23 awarded Notable Question Mar 8 awarded Popular Question Apr 8 awarded Scholar Apr 8 comment Simplify expressions with Log Perfect - that's exactly what I was looking for with the added benefit it can be applied in other situations too. Thanks! Apr 8 accepted Simplify expressions with Log Apr 6 awarded Commentator Apr 6 comment Simplify expressions with Log This looks very good. Is there any easy way I can allow multiple arguments for rule1, i.e. rule1 = Log[a_] + Log[b_] + Log[]... -> Log[a*b*...]? Apr 6 comment Simplify expressions with Log @Mr.Wizard - it works because it's shorthand for Simplify[Log[Exp[n Log[a] + m Log[b] - m Log[a + b] - n Log[a + b]]]] . So works perfectly for this expression; however, it won't work for more complex expressions. See the Prefix. Apr 4 awarded Supporter Apr 4 comment Simplify expressions with Log That's great. Shall test it tomorrow. Thank you Apr 4 asked Simplify expressions with Log Mar 23 comment Replace an expression with a slightly tricky LHS transformation @MichaelE2 thanks. looks good. Trying to test it against the other expressions I have. Mar 23 asked Replace an expression with a slightly tricky LHS transformation Feb 20 comment How to transform an expression using algebraical instead of pattern rules @PinguinDirk yes that seems to return the same result as the ExpandAll statement. Seems much better. Might take a while to run against a quartic on my laptop. Will investigate a little further. I will also investigate Eliminate mentioned elsewhere. Thanks. Feb 20 comment How to transform an expression using algebraical instead of pattern rules @chuy how would you expand that idea to discriminants? Feb 20 comment How to transform an expression using algebraical instead of pattern rules @b.gatessucks Yes, that's obvious. The point is that requires one to solve for k in the rule before using it. I am looking for an automated way of making these transformations. Feb 20 asked How to transform an expression using algebraical instead of pattern rules Feb 20 awarded Teacher Feb 19 answered Expanding a polynomial with fractional powers