lispdoc  results for exp 
(exp number)  Function: Return e raised to the power NUMBER.

Example:(defun simprule (rule) "Transform a rule into proper format." (let ((exp (infix>prefix rule))) (mkexp (expandpatmatchabbrev (explhs exp)) (expop exp) (exprhs exp))))  Mentioned in: CLtL2  12.5.1. Exponential and Logarithmic Functions CLtL2  12.5.3. Branch Cuts, Principal Values, and Boundary Conditions in the Complex Plane HyperSpec  Function EXP, EXPT PCL  functions as data aka higher order functions PCL  higher math PCL  inverse chi square 
By Bill Moorier 