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 Apr23 awarded Notable Question Mar8 awarded Popular Question Apr8 awarded Scholar Apr8 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! Apr8 accepted Simplify expressions with Log Apr6 awarded Commentator Apr6 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*...]? Apr6 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. Apr4 awarded Supporter Apr4 comment Simplify expressions with Log That's great. Shall test it tomorrow. Thank you Apr4 asked Simplify expressions with Log Mar23 comment Replace an expression with a slightly tricky LHS transformation @MichaelE2 thanks. looks good. Trying to test it against the other expressions I have. Mar23 asked Replace an expression with a slightly tricky LHS transformation Feb20 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. Feb20 comment How to transform an expression using algebraical instead of pattern rules @chuy how would you expand that idea to discriminants? Feb20 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. Feb20 asked How to transform an expression using algebraical instead of pattern rules Feb20 awarded Teacher Feb19 answered Expanding a polynomial with fractional powers Feb19 awarded Editor