func main()
	const mod: int :: 1000000007
	var t: int :: cui@inputInt()
	for(1, t)
		var n: int :: cui@inputInt()
		var ans: int :: 1
		for i(0, n - 1)
			do ans :* cui@inputInt() + 1
			do ans :% mod
		end for
		do ans :+ mod - 1
		do ans :% mod
		do cui@print("\{ans}\n")
	end for
end func