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 Mar 21 comment Proving that two expressions are equivalent Sorry, this is a regular expression, where the * is zero or more (the kleene star), and the | is "or". Thank you for trying to help ~ Dec 25 comment How to solve a literal equation Thank you so much David! ^^ Dec 18 comment Simple logarithmic equation Thank you very much for your thoughtful and thorough answer! I appreciate it very much! Dec 17 comment Simple logarithmic equation I got to that, but I'm not sure where to go from this stage. I might divide it but I am not permitted a calculator. Nov 23 comment Finding degree of expression Could you also please show me how to solve $-n 2^{n-1}=192$? Thanks! Nov 23 comment Finding degree of expression Thanks! Just on two little parts, how would you solve $-n\cdot2^{n-1}=-192$ and how did you get $\frac{n!}{(n-1)!}(2a)^{n-1}=-n\cdot2^{n-1}a^{n-1}$? Nov 23 comment Binomial theorem application Slow(er), but amazing answer! Thanks ^^ Nov 22 comment Binomial theorem application Thanks so much ! ^^ Nov 22 comment Binomial theorem application Thanks for your clear answer! I understand the latter part, but can you please explain how A, B and C are also equal to it? I've just come out of high school in a poor district with sub-par math teaching and I'm trying to catch back up again. Nov 22 comment Binomial theorem application Sorry, can you please explain how A, B and C are also equal to it? I've just come out of high school in a poor district with sub-par math teaching and I'm trying to catch back up again.