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Zad 5
a) =x^2+7x-2+x^3-4x^2+2x+11=x^2+7x+x^3-4x^2+2x+9=-2x^2+9x+x^3+9
b) =5x^2+8x+12+3x^2+x-6=8x^2+9x+6
c) =x^4+2x^2-7x^3-14x
Zad 14 odp A