simplify using suitable identities
(a)(x²-1)(x⁴+x²+1)
(b)1/2²+1/3²-5/6²
(c)(a+b)(a-b)(a²-ab+b²)(a²+ab+b²)
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BRAINLIEST BRAINLIEST BRAINLIEST BRAINLIEST BRAINLIEST BRAINLIEST
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