7.7.3 Can you answer these questions?

7.7.3.1 Unpacking list of arguments into parameters

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=240016

I have a list in the following form: 
 list = {{a,1,3},{b,1,3},{c,1,3}} 
 
Now I want to apply this list as parameters for the Sum function so that I end up with the ... 
[expression-manipulation]
 

asked by Hell stormer https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=77333 1 vote

7.7.3.2 Can one preset credentials for ServiceConnect["Twitter", "New"] to allow wolframscript headless use?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=240056

Trying to run some wolframscript code from a server, is it possible to set  ServiceConnect  credentials in the environmental variables for example? 
[external-calls] [social-media]
                                                                                  

                                                                                  
 

asked by Tim https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=416 3 votes

7.7.3.3 Warnings while solving a system of coupled differential equations

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=239861

I have a system of differential equations, given by 
... 
[differential-equations] [numerics] [warning-messages]
 

asked by No name https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=69573 1 vote