Unfortunately, the built in Windows calculator sucks. It uses postfix notation for functions (like sin, cos, log, etc.), doesn’t support useful functions like cartesian/polar conversion, combinations permutations (nCr, nPr on my real calculator), fractions etc., doesn’t understand standard mathematical operations like multiplication: “5(8+2)” doesn’t get the right result - instead, it returns “10”. Also, no expression editing or graphing.
Also, I can’t find the random number generator, and the statistics mode seems to be missing. Overall, calc.exe doesn’t leave a good impression.