Plus42 Equations, Preview Release

[Thomas Okken]

I posted another update, with these enhancements:

1. In the ∫() element, you now provide an expression as the first argument, not a name. I expect that to be more convenient in most cases, but if needed, it is still possible to provide an equation name or program label, using the equation call or program call syntaxes: EQN_NAME(X:Y:Z) or XEQ(PRGM_NAME:X:Y:Z).
2. Matrices and vectors embedded in equations using [[A:B]:[C:​D]] notation. Row vectors can be entered like [[A:B:C]] and column vectors like [A:B:C]; the latter is basically a shorthand for [[A]:[B]:[C]].
3. Exposed these HP-42S matrix functions: CROSS, DET, DOT, FNRM, INVRT, RNRM, RSUM, TRANS, and UVEC.