For [1], the math in the (only) result is broken. [1] http://search.mathweb.org/zbl/?query-text=&query-math=%5Cint_0%5E%5Cinfty%20%5Cfrac%7B%5Csin%20%3Fx%7D%20%7B%3Fx%7D%20d%3Fx#1
For [1], the math in the (only) result is broken.
[1] http://search.mathweb.org/zbl/?query-text=&query-math=%5Cint_0%5E%5Cinfty%20%5Cfrac%7B%5Csin%20%3Fx%7D%20%7B%3Fx%7D%20d%3Fx#1