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

求下列不定积分:-|||-(22) int dfrac (cos 2x)({cos )^2x(sin )^2x}dx ;

求下列不定积分：int dfrac (sin xcos x)(1+{sin )^4x}dx.求下列不定积分：.

)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 (sin x)(1+{cos )^2x}dx=-|||-__

计算不定积分int (e)^x((3)^x+dfrac ({e)^-x}({sin )^2x})dx-|||-__.计算不定积分.

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

求不定积分 int (e^arctan x + 2x ln (1 + x^2))/(1 + x^2) dx.求不定积分 $\int \frac{e^{\arct

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 (dx)(2sin x-cos x+5)求下列不定积分