3.6.3 Can you answer these questions?

3.6.3.1 integrate giving wrong result
3.6.3.2 Why FinancialDerivative fails for the Spread case?
3.6.3.3 What does the GraphLayout -> "SpectralEmbedding" option do (mean) when displaying a graph?
3.6.3.1 integrate giving wrong result

http://mathematica.stackexchange.com/questions/120495/integrate-giving-wrong-result

 
A question with the same title has been asked many times, but I can't find the solution of my problem in their answers. The integral I am trying to calculate is 
 
Integrate[Sin[q ]^2 / Sinh[q]^2, {q,  ...
 
- asked by Felix 7votes
3.6.3.2 Why FinancialDerivative fails for the Spread case?

http://mathematica.stackexchange.com/questions/120277/why-financialderivative-fails-for-the-spread-case

 
According to the documentation center for FinancialDerivative in version 10.4, when there are multi assets, we still may use FinancialDerivative with the corresponding correlation matrix to find the  ...
                                                                                  

                                                                                  
 
- asked by M.J.2 2votes
3.6.3.3 What does the GraphLayout -> "SpectralEmbedding" option do (mean) when displaying a graph?

http://mathematica.stackexchange.com/questions/120139/what-does-the-graphlayout-spectralembedding-option-do-mean-when-displayin

 
I have some relational data represented as a graph. As such some of the relational properties can be recognized. When I use the GraphLayout -> "SpectralEmbedding" option a very nice and sharply  ...
 
- asked by Phillip Dukes 5votes