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00
723x
-x
Add & Subtract: 17x4−5x3+5x3−345x+23x2−45x4+54x17x^4-5x^3+5x^3-345x+23x^2-45x^4+54x17x4−5x3+5x3−345x+23x2−45x4+54x
-62x4+23x2-291x
67x3x^3x3 +39x2x^2x2 +100xxx +512
It is done.