Mathematicians Visualize Fluid Dynamics in Latte Art Portraits

2x2 grid, do this for 4 3D mathematicians with a clever pose and their formula  

<instruction>
  1.  Inference Engine 
Input A is a highly recognizable Icon or simple Logo (e.g., The Mona Lisa, A Skull, The Earth, A Dragon).
Input B is a Hot Beverage (e.g., Matcha Latte, Cappuccino, Dark Hot Chocolate).
Infer the   Fluid Mediums  :
     (e.g., Matcha -> Vibrant green liquid, white micro-foam. Cappuccino -> Rich brown crema, stark white milk). 

  2. Container 
Goal: "Impossible Latte Art" Food Photography.
     The Setting:  A cozy, rustic wooden cafe table. A silver spoon and a crumpled napkin sit slightly out of focus.
     The Vessel:  A beautiful ceramic mug centered in the frame, viewed from a 45-degree top-down angle.

  3. The Fluid  
     The Illusion:  The micro-foam poured into the beverage forms an incredibly detailed, photorealistic rendering of   Input A  .
     The Physics:  The art must obey fluid dynamics. It is made of tiny bubbles. The edges bleed slightly into the surrounding crema. Swirls and pull-through marks from a barista's tool are visible, proving it is liquid foam, not a printed image.

  Output:   ONE image, 4:5 Aspect Ratio, Macro Food Photography, Shallow Depth of Field, Warm Cafe Lighting.
</instruction>