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Mathematics 15 Online
OpenStudy (anonymous):

(3x7 + 8x4 + 7) - (x4 - 2x)

OpenStudy (anonymous):

\[(3x^7 + 8x^4 + 7) - (x^4 - 2x)\] \[3x^7 + 8x^4 + 7 + -x^4 + 2x\] \[3x^7 + 7x^4 + 2x + 7\]

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