(17) int dfrac (2cdot {3)^x-5cdot (2)^x}({3)^x}dx-|||-(18) (int )_(e)^exe(sex-tan x)dx;-|||-(19) (int )_(cos )^2dfrac (x)(2)dx;-|||-(20) int dfrac (dx)(1+cos 2x);-|||-(21) int dfrac (cos 2x)(cos x-sin x)dx;-|||-(22) int dfrac (cos 2x)({cos )^2x(sin )^2x}dx;-|||-(25) cot ^2xdx;-|||-(24) int cos theta (tan theta +sec theta )dtheta ;-|||-(25) int dfrac ({x)^2}({x)^2+1}dx;-|||-(26) int dfrac (3{x)^4+2(x)^2}({x)^2+1}dx.

int dfrac (2cdot {3)^x-5cdot (2)^x}({3)^x}dx-|||-__；；

求下列不定积分:-|||-int dfrac (2cdot {3)^x-5cdot (2)^x}({3)^x}dx =

int (3 cdot 2^x - 2 cdot 3^x)/(2^x) dx =A. $3x - 2\ln \frac{3}{2} \cdot \left(\f

int dfrac (2{x)^3+2x+3}({x)^2+1}dx=(x)^a+b(x)+C 则 cdot b(x)=

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

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

计算(int )_(-2)^1dfrac (1)({(7+3x))^3}dx-|||-__时，令(int )_(-2)^1dfrac (1)({(7+3x))^

int dfrac ({x)^5+(x)^4-8}({x)^3-x}dx-|||-__-|||-__..

int dfrac (x)(3-2{x)^2}dx;

int dfrac ({e)^x}({2)^x}dx;