1.=∫1+sinxdx=x-cosx+C
2.=-∫2^(1/x)d(1/x)=-2^(1/x)/ln2+C
3.=∫e^(x/2)√(1-1/e^x)dx
=2∫√(1-1/e^x)de^(x/2)
令e^(x/2)=cscu=1/sinu
=2∫cosudcscu
=-2∫cot²udu
=-2∫csc²u-1du
=2cotu+2u+C
4.=xln(x²+1)-∫x*2x/(x²+1)dx
=xln(x²+1)-2∫1-1/(x²+1)dx
=xln(x²+1)-2x+2arctanx+C
5.=∫lnlnxdlnx=lnx*lnlnx-lnx+C(由∫lnudu=ulnu-u)
6.=∫sec²x-1+tanxdx
=tanx-x-ln|cosx|+C
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