Questions about SymEngine.jl

[sym_mat]

I am trying to use the package SymEngine.jl (running with julia 1.5.2 on a linux machine). Any assistance with the following would be appreciated.

(1) A list of SymEngine.jl functions for linear algebra computations with symbolic matrices. For example, reduced row echelon form, determinant, transpose, etc

Also, how does one get help on using the above functions?

(2) A list of SymEngine.jl simplification functions for simplifying symbolic expressions containing trigonometric terms, etc

(3) I used the command 

>names(SymEngine, all = true) 

and obtained a very long list of names, including function names. How does one call these functions from the julia command line?