y=x^2+2^x, dy=(2x+2^xln2)dx, dy(0)=ln2 dxy=e^xsin3x dy=e^x(sin3x+3cos3x)dx, dy(0)=3dxy=e^xsinx, dy=e^(xsinx)(sinx+xcosx)dx, dy(π/2)=e^(π/2)dxy=sin(lnx), dy=[cos(lnx)/x]dx, dy(1)=dx