计算(-3x^2+5)(-3x^2-5)-x^2(3x+4)(3x-4)-16(-x)^2
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计算(-3x^2+5)(-3x^2-5)-x^2(3x+4)(3x-4)-16(-x)^2计算(-3x^2+5)(-3x^2-5)-x^2(3x+4)(3x-4)-16(-x)^2计算(-3x^2+5
计算(-3x^2+5)(-3x^2-5)-x^2(3x+4)(3x-4)-16(-x)^2
计算(-3x^2+5)(-3x^2-5)-x^2(3x+4)(3x-4)-16(-x)^2
计算(-3x^2+5)(-3x^2-5)-x^2(3x+4)(3x-4)-16(-x)^2
原式=(9x^4-25)-x^2(9x^2-16)-16x^2
=9x^4-25-9x^4+16x^2-16x^2
=0
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