[R] Integrating functions in R

[kvest at al.umces.edu]

I want to integrate the function (sin^7*x)*(cos^8*x)dx.  I do not have
values to integrate between.  I just want R to give me the integral of the
function.  For example R takes the derivative of the function by 
d1=D(expression(x^2*(cosh*(x^3))), "x").  Is there a similar function
available in R to find the integral?

Thanks,
Kim