Reduced Polish Notation for the TI-89   By: Jake Griffin (Jrock7286@aol.com)

RPNFORM is a TI-BASIC function that returns the way an expression would be typed into an RPN enabled calculator or program.  If you don't understand RPN notation, or just want a quick way to know how to type in a complex expression, theis is the program for you!

NOTE: This program simplifies expressions first!
Syntax:
rpnform(expression)     RETURNS string of commands to input into the RPN calculator

Examples:
rpnform(x^2+5x-2)     RETURNS "x,2,^,5,x,*,+,2,-"
rpnform(a+b)          RETURNS "a,b,+"
rpnform((a+b)*(c/d))  RETURNS "a,b,+,c,*,d,/"
rpnform(1+9/3)        RETURNS "4"