Plus42 Equations, Preview Release

[Albert Chan]

I tried to implement TVM, rearranged to match HP12C order: N,I,PV,PMT,FV

TVM: (1/EXPM1(N*LNP1(I))*(PV+0*PMT+FV)+PV)*I+PMT=0

Curiously, if I expand the expression, cut/paste to calculator:

1/EXPM1(N*LNP1(I))*(PV+0*PMT+FV)*I+PV*I+PMT

All I get is 1, not the string.

Looking further, "E" caused the parsing issue.
"Everything" --> <Not a Number>
"1+E" --> 1
"1-E" --> 1
"1*E" --> 1
"1/E" --> 1