1/2x-(5x+2/3x²)-3(-1/2x+1/9x²)求化简
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1/2x-(5x+2/3x²)-3(-1/2x+1/9x²)求化简
1/2x-(5x+2/3x²)-3(-1/2x+1/9x²)求化简
1/2x-(5x+2/3x²)-3(-1/2x+1/9x²)求化简
-x^2-3x
1/2x-(5x+2/3x²)-3(-1/2x+1/9x²)求化简
1/2x-(5x+2/3x²)-3(-1/2x+1/9x²)求化简
1/2x-(5x+2/3x²)-3(-1/2x+1/9x²)求化简
-x^2-3x