int dfrac (ln x)({(1+{x)^2)}^3/2}dx;

int dfrac ({x)^3}({(1+{x)^2)}^2}dx=A.int dfrac ({x)^3}({(1+{x)^2)}^2}dx=B.int df

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

int dfrac ({x)^3}(sqrt {1+{x)^2}}dx,

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

int ln (sqrt (1+{x)^2}-x)dx;

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

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

设 gt 0, 则 =(int )_(-a)^asqrt ({a)^2-(x)^2}ln dfrac (x+sqrt {1+{x)^2}}(3)dx= __

设 gt 0, 求 (int )_(-a)^asqrt ({a)^2-(x)^2}ln dfrac (x+sqrt {1+{x)^2}}(3)dx,

[题目]-|||-int (dfrac (3)(1+{x)^2}-dfrac (2)(sqrt {1-{x)^2}})dx