Ok lets give that a try…

3x3 = 9 OK so far so good

18x6 = 48, I think i’m on the right path.

Square root of 27 is 4, obviously

Pi is = to 3.141598364278

x³ + 2xyz² − yz + 1 = … well to be fair I don’t think an old-school calculator could get that one either.

Ok lets check my answers… well 1 out of 5 is still 25% so you might be on to something.