factor out a term to cancel in a fraction

*To*: mathgroup at smc.vnet.net*Subject*: [mg98818] factor out a term to cancel in a fraction*From*: sean_incali at yahoo.com*Date*: Mon, 20 Apr 2009 01:31:00 -0400 (EDT)

Hello group. I'm trying to do a little algebra which i can do in my head using Mathematica. Why? Well, it's neater. Consider the following. p'[t] == (e0 s[t] k1 k2 )/ (s[t] k1 + k1 Km) Factor out k1 and cancel it to simplify the expression. Why is this so difficult to accomplish in mathematica? Following does nothing. p'[t] == (e0 s[t] k1 k2 )/ (s[t] k1 + k1 Km) // Assuming[k1 > 0, {Collect[#, k1]}] & Thanks for any info. Sean

**Follow-Ups**:**Re: factor out a term to cancel in a fraction***From:*Andrzej Kozlowski <akoz@mimuw.edu.pl>