a²(a²+b²)(a²-b²)+(a²+b²)(2a四次方-3b的四次方)
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a²(a²+b²)(a²-b²)+(a²+b²)(2a四次方-3b的四次方)
a²(a²+b²)(a²-b²)+(a²+b²)(2a四次方-3b的四次方)
a²(a²+b²)(a²-b²)+(a²+b²)(2a四次方-3b的四次方)
a²(a²+b²)(a²-b²)+(a²+b²)(2a四次方-3b的四次方)
=(a²+b²)(a⁴+a²b²+2a⁴-3b⁴)
=(a²+b²)(3a⁴+a²b²-3b⁴)
a²(a²+b²)(a²-b²)+(a²+b²)(2a四次方-3b的四次方)
=(a²+b²)【a²(a²-b²)+(2a四次方-3b的四次方)】
=(a²+b²)(a四次方-a²b²+2a四次方-3b的四次方)
=...
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a²(a²+b²)(a²-b²)+(a²+b²)(2a四次方-3b的四次方)
=(a²+b²)【a²(a²-b²)+(2a四次方-3b的四次方)】
=(a²+b²)(a四次方-a²b²+2a四次方-3b的四次方)
=(a²+b²)(3四次方-a²b²-3b的四次方)
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