関連ワード:  antiderivative of 1/x^3    antiderivative of 1 x 3 2    antiderivative of 1 x 3 4    antiderivative of 1/x^3 dx    antiderivative of 1/3e^x    antiderivative of 1/(3 x+12)    integral of 1 x 3    integration of 1 x 3 dx    integral of 1 x 3 2    integration of 1/x^3 dx