Expression 3: natural log left parenthesis, 2 to the negative 48th power times "x" ! , right parenthesisln2−48·x!
3
Error of Stirling's approximation, just for fun :)
4
Expression 5: natural log left parenthesis, "x" ! minus StartRoot, 2 pi "x" , EndRoot left parenthesis, StartFraction, "x" Over "e" , EndFraction , right parenthesis Superscript, "x" , Baseline , right parenthesislnx!−2πxxex