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x³ +3*x*1²+3*x²*1+1³ -(4x² -2*2x*3+9)- (x² +2*x*3+3² )+ 2*(x² -4)=
x³+3x+3x²+1- (4x²-12x+9)-(x²+6x+9)+2x²-8=
x³+3x+3x²+1-4x²+12x-9-x²-6x-9 +2x²-8=
x³+9x-25