On 6/19/2012 1:36 PM, amzoti wrote: > On Tuesday, June 19, 2012 9:15:43 AM UTC-7, W. eWatson wrote: >> On 6/18/2012 10:26 PM, konyberg wrote: >>> On Tuesday, June 19, 2012 5:53:45 AM UTC+2, W. eWatson wrote: >>>> Any suggestions. Want sqrt, *,/,+,-, sin, cos, square, etc. Maybe >>>> formulas and graphs. >>> >>> I use Microsoft Mathematics alot. It's intuitive and has all you ask for and more. >>> >>> KON >> Is it now free. I tried in 2010, and it wasn't. > > It appears to be: http://www.microsoft.com/en-us/download/details.aspx?id=15702 I installed it, 64-bit Win7. If I enter -2.5*log(100000.0+18589), it produces some decimal output and a result that reorganizes the input expression. Typing in some expressions seems to get one into integrate or graphics mode. This does not seem like a comfortable tool. Typing in pi gives output false! Following it with r=3 gives a solution and a choice to plot or store variable. If I don't store it, and enter pi*r, it offers to differentiate or integrate. Storing r=3 and then entering pi*r works OK. Just a little weird. Help might very useful. Not a comfortable learning curve.