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求不定积分int(x)/(1+cos x)dx.19.（5.0分）求不定积分$\int\frac{x}{1+\cos x}dx$.

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【65】int(x^2+1)/((x+1)^2)(x-1)dx.【65】$\int\frac{x^{2}+1}{(x+1)^{2}(x-1)}dx$.

求不定积分int(1)/((1+sqrt[3](x))sqrt(x))dx.21. 求不定积分$\int\frac{1}{(1+\sqrt[3]{x})\sqr

(2025 浙江)求不定积分int(x^3)/(sqrt[3](1-2x^2) )dx.(2025 浙江)求不定积分$\int\frac{x^{3}}{\sqr

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