设y=(x^2+1)^100 ,求dy

设y=(x^2+1)^100 ,求dy 设y=√(x^2-1)求dy/dx 设y=sin2x/(1+x^2),求dy/dx, 设y=cos^2(x+1),求dy 设y=e^1-2x sinx,求dy 设y=sin2x/(1+x^2),求dy/dx, 设y=e^cos^2*1/x,求dy 设y=（x/1-x)^x,求dy/dx 设y=(2+x)^x,(x>0) ,求dy 设y=ln(x/1+x)-cot2x,求dy. 设y=(1/x)^x,求dy 设y=e^(-x) cos 1/x,求dy. 设y=[e^x+e^(-x)]^2,求dy 设y=cos(x^2+e^x)求dy 设y=(lnx)/x,求dy? 设x^2+y^2=4,求dy/dx 设函数 y = cos2x / (x-1) 求 dy 设y=ln(1+e^-x)求dy