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

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

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

int dfrac (5x-1)({x)^2-x-2}dx= (.A.int dfrac (5x-1)({x)^2-x-2}dx= (B.int dfrac (

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

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

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

int dfrac (1+2{x)^2}({x)^2(1+(x)^2})dx_____._____.

int dfrac (1+2{x)^2}({x)^2(1+(x)^2})dx_____._____.