11) integral (tanz/cosz)dz

13)integral (cos(X^1/2))/(X^1/2) )dx

15)integral from pi/2 to 0 ((cosx)/(1+(sinx)^2)dx

17)integral ((2x^2+x)/(x+1))dx

19)integral ((tanx)^1/2/1-(sinx)^2)dx

21)integral: (cos(ln4x^2)/x)dx

27)integral from 1 to 0: x10^x^2dx

29)integral ((sinx-cosx)/(sinx))dx