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-13 x^2-15x+19x^2+12x^3-11x^3+10x-5x^3

Răspuns :

-13x²-15x+19x²+12x³-11x³+10x-5x³=

(-13x²+19x²)+(-15x+10x)+(12x³-11x³-5x³)=

6x²-5x-4x³