int ((x)^2-1)sin 2xdx.-|||-18. int dfrac ({ln )^3x}({x)^2}dx.

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

(int )_(-dfrac {pi )(2)}^dfrac (pi {2)}dfrac (|x|sin x)(1+{cos )^3x}dx=(int )_(-

int 1(e)^-2tdt-|||-.(int )_(1)^2xdx.-|||-.fxsin xcos xdx.-|||-15. int (x)^2(cos

)int dfrac (1)({cos )^2x(sin )^2x}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}sin dfrac (3)(x)dx= __

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

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

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

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