Double integration within finite limits

I want to perform a double integration of the function f(x,y)=y*sin(x)+exp(-x), over the range 0 to pi/6 for x and y goes from 0 to 3. I have gone through a few answers here but they look clumsy and confusing. Can anyone please suggest me what the code for this problem will be like?

[Torsten]

Did you try "integral2" ?

Answer 1

[madhan ravi]

Simply use integral2()