Here are the results, I tried a couple different variations of the first CLI command, but everything I tried came back with some kind of syntax error. Each was tried with and without a saucepan, and the results were the same.
> modifier_eval 10+5*mainhand(saucepan)
Modifier syntax error: can't understand mainhand(saucepan)
Returned: 60.0
> ash string_modifier($skill[panhandling], "Modifiers")
Returned: Meat Drop: [10+5*mainhand(saucepan)]
edit: I should also probably point out that my main also has expert pandhandling, but has not suffered from this problem, however its in hardcore right now, so I can't do any testing with it right now, since it doesn't have panhandling HPed