Hi. I hope this will help you for future references.
<3
If you are not talking about exponents:
First, multiply the numbers.
35*32=1120
Your answer ---> 1120
160+960=1120
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If you ARE talking about exponents, then you should start like this:
3⋅3
3⋅3⋅3⋅3⋅3
there are 7 3s, so your answer would be 3^7
Hope I helped you out a bit here and gave you a better view on both sides of this question
Asia Gil <3