Integration in W|A with no output

[rsrimeio (Renato Rabelo)]

With first method I don’t get an answer. The second method I get. Why ?

[gianlucagorni]

How did you type those stars? They look different in the two examples. In the language we can use various stars: \[RawStar], \[FivePointedStar], \[Star], \[SixPointedStar], with possibly different meanings.

[rsrimeio (Renato Rabelo)]

I tried with [RawStar] and [Star] and still no answer] with == from mathematica

[dontdont9 (Bill Nelson)]

Try

Integrate alpha e^(-alpha x) from x=a to b

useSpaceCharacterInsteadOfStar

Try

Integrate alpha*e^(-alpha*x) from x=a to b

useAsterixInsteadOfStar

[rsrimeio (Renato Rabelo)]