(x^2+4)-16x^2
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(x^2+4)-16x^2(x^2+4)-16x^2(x^2+4)-16x^2(x^2+4)-16x^2=x²+4-16x²=-15x²+4很高兴为您解答,【the190
(x^2+4)-16x^2
(x^2+4)-16x^2
(x^2+4)-16x^2
(x^2+4)-16x^2
=x²+4-16x²
=-15x²+4
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