Literal expression should show More... after it

Due to Bubble’s lack of parentheses in expressions, I’m forced to place both “factor” and “1-factor” in my database in order to later on be able to do:

student final rating = student_roles_average_rating * (1-factor) + team_rating * factor

However, even then, to set the formula 1 - factor if very hard, since Bubble’s dynamic data editor doesn’t show More… after I place 1 at the start of the formula. It can’t also do -1 * something so that I would type in -1 * factor + 1. Luckily it allows me to do factor * {-1} + 1. It would be much more straightforward to show More… after a literal in dynamic data expressions so that I can start an expression with a literal