Lets say if:
x := 3
y := 5
z := answer
How would you do z := x^y in spin? (3^5 = 243)
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My daughter purchased an HP Windows 8 laptop a little over a year ago. It did not come with a Windows 8 disk, only the recovery partition on her HDD.
Go here for source, binaries, and to report issues: http://code.google.com/p/open-source-spin-compiler/