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x⁴+x²+x+x⁵+x²+x=x⁵+x⁴+2x²+2x=x(x⁴+x³+2x+2)
f-g
x⁴+x²+x-x⁵-x²-x=-x⁵+x⁴=x⁴(-x+1)
b) f+g
¾x⁶-2x⁴+5/2x²+4+1/4x⁶+2x⁴+x³-¼x²-2x+2=x⁶+x³+9/4x²-2x+6
f-g
¾x⁶-2x⁴+5/2x²+4-¼x⁶-2x⁴-x³+¼x²+2x-2=½x⁶-4x⁴-x³+11/4x²+2x+2