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6x^2
-6x^2
8x^2
-8x^2
0
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-36abc
-36a^3b^2c^4
36a^3b^2c^4
36a^2bc^3
0
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x-y+z
-xyz
xyz
-x+y+z
0
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2m^7n^4
18m^8n^4
-2m^7n^4
-18m^8n^5
0
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-3x^4
-9x^4
24x^4
14x^4
0
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2500x^5
2500x^6
-2500x^5
-2500x^6
0
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-30x^5y^4
-18x^4y^5
45x^5y^5
18x^5y^4
0
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y^2 + 15y - 50
y^2 - 15y - 50
y^2 - 5y - 50
y^2 + 5y - 50
0
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8x^6y^7z^6
16x^5y^8z^7
-8x^6y^7z^6
-16x^5y^8z^7
0
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18x^5y^8
32x^2y^7
-32x^2y^7
-18x^y^7
0