(x³-2)²+(x²+0)²=x⁶-4x³+4+x⁴+0+0=x⁶+x⁴-4x³+4;
(x³-2)²+(x²+2x)²=x⁶-4x³+4+x⁴+4x³+4x²=x⁶+x⁴+4x²+4;
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(x³-2)²+(x²+0)²=x⁶-4x³+4+x⁴+0+0=x⁶+x⁴-4x³+4;
(x³-2)²+(x²+2x)²=x⁶-4x³+4+x⁴+4x³+4x²=x⁶+x⁴+4x²+4;