!echo
; This file shows how to evaluate derivatives.
!deriv x, 7 : 2*x + 5
!deriv x, 5 : x^2 - 2*x + 3
!deriv x, 4 : (x + 1) ^ 2
!deriv x, pi()/3 : sin(x)
;
; The following uses a limited range because the function is
; undefined at x = 200.1.
;
!deriv x, 200, 0.09 : 1 / (x - 200.1)
!noecho