When I got to university the calculus instructor told us "we could use calculators, but they're going to be worthless" sure enough we only had symbols with a fe

When I got to university the calculus instructor told us "we could use calculators, but they're going to be worthless" sure enough we only had symbols with a few numbers used as filler, but nothing you couldn't work out in your head. ie. (5x+2)^-3n