What is 9 superscript 7 written in expanded form? 9 + 9 + 9 + 9 + 9 + 9 + 9 9 times 9 times 9 times 9 times 9 times 9 times 9 7 + 7 + 7 + 7 + 7 + 7 + 7 + 7 + 7 7 times 7 times 7 times 7 times 7 times 7 times 7 times 7 times 7