Cos x²e^x3 cos(e^x3)         

   cos3x²e^x3 cos(e^x3)         

    -(4x-6) cos cos (2x² -6x)

2x sec(x²)       

 2sec(x²)            

    2x sec²(x²)

$\frac{\sec^2\left(x^2+1\right)}{\sqrt{\tan\left(1+x^2\right)}}$

$\ \frac{x\sec^2\left(x^2+1\right)}{\sqrt{\tan\left(1+x^2\right)}}$

$\ \frac{x\sec^2\left(x^2+1\right)}{\sqrt{\tan\left(x^2\right)}}$

$\frac{dy}{du}$

$\frac{dy}{dx}\ \frac{dx}{du}$

$\frac{dy}{du}\ \frac{du}{dx}$

Cosx² e^x3 cos(e^x3)         

  cos3x² e^x2 cos(e^x2)     

  cos 2xe^x2 cos(e^x2)

2xcos(x²)        

 2cos(x²)      

  xcos(x²)

$\frac{2\sqrt{x}}{4\sqrt{x+\sqrt{x}\ \sqrt{x}}}$

$\frac{\left(2\sqrt{x}+1\right)}{4\sqrt{x+\sqrt{x}\ \sqrt{x}}}$

$\frac{\left(\sqrt{x}+1\right)}{4\sqrt{x+\sqrt{x}\ \sqrt{x}}}$

$\frac{2u^2}{u^2-1}$

$\frac{u^2}{u^2+1}$

$\frac{u^2}{u^2-1}$

$\left(4x-6\right)\cos\ \cos\left(2x^2-6x\right)$

$\cos\cos\left(2x^2-6x\right)$

$-\left(4x-6\right)\cos\cos\left(2x^2-6x\right)$

2xcos(x²)              

 sinsin(tanx)x         

    -sinsin(tanx)x