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Y=x^3tan^2(x^2-4) 導関数 Y‘=3x²tan^2(x^2-4)+x³2tan(x^2-4)sec(x^2-4)*2x 微分 dy=y'dx=[3x²tan^2(x^2-4)+x³2tan(x^2-4)sec(x^2-4)*2x]dx
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