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

.int dfrac (sqrt {1+{x)^2}+sqrt (1-{x)^2}}(sqrt {1-{x)^4}}dx.

[题目] int dfrac (x)(sqrt {1-{x)^2}}dx

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

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

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

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

(6) () =dfrac (1)(sqrt {1-{x)^2}} int dfrac (1)(sqrt {1-{x)^2}}dx=() .

2.求下列不定积分:-|||-(14) int (dfrac (3)(1+{x)^2}-dfrac (2)(sqrt {1-{x)^2}})dx;

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

(15) int dfrac ({x)^2}(sqrt {1-{x)^2}}dx