4.30.3 Can you answer these questions?

4.30.3.1 Operator on a multivariable function in a sum

https://mathematica.stackexchange.com/questions/153092/operator-on-a-multivariable-function-in-a-sum

 
I need to define an operator that does as follow for any function $h_m$. 
 
$\qquad O[h_m](k,M,b,l_{max})=\sum_{l\neq (0,m)}^{l_{max}}il \left (h_l(k,M,b,l_{max}) b_{m-l}(k)- c_l\partial_k  ...
 

- asked by Michael_J 1vote

4.30.3.2 Direct input in Chinese, Korean or Japanese

https://mathematica.stackexchange.com/questions/153042/direct-input-in-chinese-korean-or-japanese

 
Sometimes I need to create a document in Japanese: I know Mathematica supports typing in Japanese. However it doesn't seem to support direct (inline) input in Japanese. 
 
Whenever I need to convert a  ...
 

- asked by Tadashi Kikuno 5votes

4.30.3.3 Parametric Plot of Faces

https://mathematica.stackexchange.com/questions/152909/parametric-plot-of-faces

 
In How do I draw a pair of buttocks? there is a discussion how to draw a human backside. It shows an example of Manipulate to ParametricPlot3D this part of a body. 
 
In this discussion they were  ...
 

- asked by Adalbert Hanen 1vote

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