Gen~ [expr] syntax

Hey All,

I'd really appreciate a helping hand, I'm at a standstill. I am working in a larger gen~ patch, involving triggering a loop if the playback pointer if outside of a certain window. I typed up a nice little expr object that works when I test it in a regular patch, but when I try the gen~ version inside of my patch, I am constantly getting two error messages saying "expr missing ')'", and I can't figure out where I'm missing a parenthesis. More importantly, I'm not really clear on the order of operations in expr, and when parenthesis are necessary (they certainly make things look clearer).

logic:
Output 1 if...
($i2$i3) is true;
~OR~ if BOTH of the following are true ($i1$i3).

typed up as so:
[expr (in2in3) || (in1in3)]

As the above does not work in Gen~ expr, and even after trying a half dozen variations I'm still constantly getting error messages, I come to you for help!