I'd pay for a copy of Macsyma. Not the open source Maxima version, which is based on its development stage in 1982. The latter is all right, but Macsyma was ext

I'd pay for a copy of Macsyma. Not the open source Maxima version, which is based on its development stage in 1982. The latter is all right, but Macsyma was extremely good. I can still buy a copy ... for WinXP... http://www.symbolics-dks.com/Macsyma-1.htm http://www.symbolics-dks.com/Macsyma-1.htm For a while you couldn't even get that. Macsyma was one of those things where proprietary software can end tragically. Otherwise, I'd pay for a J compiler that could make fast tree structures, but that never existed, and the market is probably 1.