Something like the old QuicKeys or the current Keyboard Maestro. They have the ability to assign to a keystroke or two (like "option-L") a series of mouse and/or keyboard "transactions".
I suspected you meant that, and I've already got that functionality in Butler, but the need for it suggests that PCalc exports its formulae and that, therefore,
each one requires a unique hotkey...ridiculously cumbersome in my instance. (Butler would allow me to put all of them into a single pop-up menu, which, although not as cumbersome, would still entail extra work.)
Calculator + f stores its presets onboard as did Calq.
Yep! Calculator + f looks like my answer.
It's really a shame that Calq's dev has thrown in the towel; it was a unique, elegant, and highly functional, but simple, app with MANY fans.