Index
Evaluation of definite integrals

Function  I(f,x,a,b,n)  approximates a definite integral of expression f with respect to the
only variable x on the interval (a,b) using Simpson’s rule with a constant step (b-a)/n. 
Example:
I(sin(x),x,0,pi,10)       I(sin(x),x,0,pi,10)       I(sin(x),x,0,pi,100)

      1.9967            1.9992            2