5x*2+4x*2+7x
![5 {x}^{2} + 4 {x}^{2} + 7 5 {x}^{2} + 4 {x}^{2} + 7](https://tex.z-dn.net/?f=5+%7Bx%7D%5E%7B2%7D++%2B+4+%7Bx%7D%5E%7B2%7D++%2B+7)
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your answer is is 9x² + 7x
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