2x^2-14x+9+(-2x^2+4x+11)=20-10x
19a^2-17a^2b+b^3-(19a^2-2a^4-22a^2b+b^3)=2a^4+5a^2b
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2x^2-14x+9+(-2x^2+4x+11)=20-10x
19a^2-17a^2b+b^3-(19a^2-2a^4-22a^2b+b^3)=2a^4+5a^2b