2.计算下列不定积分：(9)int dfrac (x{e)^arctan x}({(1+{x)^2)}^dfrac (3{2)}}dx.

7.不定积分 int dfrac (arctan x)({x)^2(1+(x)^2)}dx= __

求不定积分int (x)^2(ln x-dfrac (1)(1+{x)^2})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:-|||-(14) int (dfrac (3)(1+{x)^2}-dfrac (2)(sqrt {1-{x)^2}})dx;

(9) int dfrac (x{e)^arctan x}({(1+{x)^2)}^dfrac (3{2)}}dx ;

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

4.计算下列不定积分.-|||-(6)int dfrac (sin dfrac {1)(x)}({x)^2}dx

13.计算不定积分 int dfrac ({x)^2arctan x}({x)^2+1}dx

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

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