`intxcosec^2xdx`

Explanation

`intxcosec^2xdx` [x=1st
`cosec^2x=2nd`]
=`x.intcosec^2xdx-int[d/dx(x)xxintcosec^2xdx]dx`
=`-xcotx+intcotxdx`
=`-xcotx+ Inabs(sinx)+C`