The risch command takes one mandatory argument and three
optional arguments. The first argument is an expression to be
integrated. If the variable is not x, then the second
argument is the variable. The third and fourth arguments are the
limits of integration for when you want a definite integral.
risch returns a primitive (with one or two arguments) or a
definite integral (with four arguments).
Input:
^
2)Output:
^
3/3Input:
^
2,x,0,1)Output:
Input:
^
2,t)Output:
^
3/3Input :
^
2))Output :
^
2),x)that is to say that exp(−x2) has no primitive expressed with usual functions.