Simple number / function / inputter-outputter => graphs would work fine. GraphObj => input #'s, output => rendered lines. PlusObj => input two #'s, output =>

Simple number / function / inputter-outputter => graphs would work fine. GraphObj => input #'s, output => rendered lines. PlusObj => input two #'s, output => one number. MulObj => ...etc... x-obj => series of numbers ForObj => loops over numbers => sends to graph etc...