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

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

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

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

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

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

求不定积分int dfrac (arctan sqrt {x)}(sqrt {x)(1+x)}dx求不定积分

不定积分 int (dfrac (1)({x)^2}+2sin x+dfrac (1)(x))dx= ( )不定积分 ()A.B.C.D.

7.求下列简单有理函数的不定积分:-|||-(1) int dfrac (2x+1)({x)^2-2x+2}dx ;

计算不定积分int dfrac (2cos dfrac {1)(x)}({x)^2}dx计算不定积分