Simplify the expression $(9x^2+3x+7)+(3x^2+7x^5+2)$. Express your answer as a polynomial with terms arranged in decreasing order of degree.
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Simplify the expression $(9x^2+3x+7)+(3x^2+7x^5+2)$. Express your answer as a polynomial with terms arranged in decreasing order of degree.
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
7x^5+12x^2+3x+9
Simplify the expression $(9x^2+3x+7)+(3x^2+7x^5+2)$. Express your answer as a polynomial with terms arranged in decreasing order of degree.
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