Enabling EL on Tomcat 5.0

[Valter G. Nogueira Jr.]

I am following the book Java Server Pages, 3rd Edition and all samples run in a snap.

But when I try to use EL no my pages it doesn't work. I mean if a write:

${1+2+3}

I got the ${1+2+3} instead of 6


 How should I configure tomcat to evaluate expression?

Thanks,

Valter