evinda
Gold Member
MHB
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I like Serena said:Yep. All correct. (Smile)
Erm... except for the $du=8dr$, which should be $du=8rdr$.
Apparently that is what you used anyway. (Mmm)
Yes,that's what I used.. (Nod)Thank you very much! (Mmm) (Smirk)