How to disable Integrate[] ?

*To*: mathgroup at smc.vnet.net*Subject*: [mg109467] How to disable Integrate[] ?*From*: "slawek" <slawek at host.pl>*Date*: Wed, 28 Apr 2010 02:00:19 -0400 (EDT)*Organization*: Telekomunikacja Polska

The input line is: In[1]:= somethingComplicated * Integrate[somethingEvenMoreComplicated,{variable,a,b}] //. rules Simplify takes about 5 minutes. And, surprise surprise, the result is still an Integrate[somethingElse,{anothervariable,p,q}] It is not so bad, the integral is obviously too compound for Mathematica (and for me), nevertheless the the reason to use Simplify or FullSimplify is not to calculate Integrate[], but rather to transform somethingEvenMoreComplicated into somethingElse. Is any easy way to force Mathematica to give up simplifing Integrate? And obviously to transform all other parts of an expression, including these parts which are integrated? HoldForm nearly do this job, but "freeze" all parts of the equation. It is possible to "hold" only Integrate function? (I tried replace Integrate by dummyIntegrate, i.e. an undefined function. But it does not work quite well.) slawek