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11c2-17
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13a2-a
5x2+4x+3
7x-7
83x-1
103x+12
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11a+16b-4c
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5ab-12a+2b
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103a-52b+1415c
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x2+11y2
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9x35+71y35
11a12-b12
48a2bc
3x2y
96x2y2z2
-m6n72
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-p9q5r496
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3x
4ab
9ab
9q8r2p
3x8y2
2ab23c
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3200b
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xy4
-4b