Can someone tell me how to calculate the Christoffel symbols in spherical coordinates in Euclidean three dimensional space?

Thank you very much in advance!

Perhaps a stupid question but I fail to convert 2^1/4a^1/4/pi^1/4 (a result of a calculation performed by maple) into (2a/pi)^1/4.

I tried simplify, combine, collect, ... with options. None of them work.

Thank you. 

 can be simplified :l *h*t/m

How can I ask Maple to do this.