関連ワード:  what is the integral of x^2    what is the integral of x^2 from 0 to 1    what is the integral of x 2    what is the integral of x 2 dx    what is the integral of x 2 3    what is the integral of x 2 1    what is the integral of x 2 from 0 to 1    integral x^2 dx    what is the integral of x 2sinx    what is the integral of x 2 4