fix powers typo (thanks maia!)
fix powers typo (thanks maia!)

daveagp/websheets,daveagp/websheets,daveagp/websheets,dz0/websheets,daveagp/websheets,daveagp/websheets,dz0/websheets,dz0/websheets,dz0/websheets,dz0/websheets,dz0/websheets,daveagp/websheets