1.求下列不定积分:-|||-(1) int dfrac ({x)^3}(x-1)dx;-|||-(2) int dfrac (x-2)({x)^2-7x+12}dx;-|||-(3) int dfrac (dx)(1+{x)^3};-|||-(4) int dfrac (dx)(1+{x)^4};-|||-(5) int dfrac (dx)((x-1){({x)^2+1)}^2} ;-|||-(6) int dfrac (x-2)({(2{x)^2+2x+1)}^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 (1)(2x)sqrt (ln x)dx=（）.int dfrac (1)(2x)sqrt (ln x)dx=int dfrac

求下列不定积分:-|||-(1) int dfrac (1)(5x-3)dx ;-|||-(3) int dfrac (1)(sqrt {x+1)+sqrt (

求下列不定积分int dfrac (1)({x)^3}(e)^dfrac (1{x)}dx求下列不定积分

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

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

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

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

求下列不定积分：int dfrac (x+1)({x)^2+2x+5}dx;求下列不定积分：;

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