求不定积分int (x)^2(ln x-dfrac (1)(1+{x)^2})dx.

求下列不定积分：int ln (sqrt (1+{x)^2}-x)dx。求下列不定积分：。

求不定积分 int (e^arctan x + 2x ln (1 + x^2))/(1 + x^2) dx.求不定积分 $\int \frac{e^{\arct

5.求不定积分 int dfrac ({sin )^2x}(1+{sin )^2x}dx.

求不定积分int dfrac (1)(2x)sqrt (ln x)dx=（）.int dfrac (1)(2x)sqrt (ln x)dx=int dfrac

求下列不定积分int ln (x+sqrt (1+{x)^2})dx求下列不定积分

求下列不定积分:-|||-int dfrac (1+2{x)^2}({x)^2(1+(x)^2)}dx ;

求不定积分int [ ln (ln x)+dfrac (1)(ln x)] dx-|||-__。求不定积分。

2.求下列不定积分:-|||-(1) int dfrac (dx)({x)^2};-|||-(2) int xsqrt (x)dx; 2.求下列不定积

2.求下列不定积分.-|||-(2) int dfrac (1)((1+2x)(1+{x)^2)}dx;

求下列不定积分：int dfrac (sin xcos x)(1+{sin )^4x}dx.求下列不定积分：.