Generate all possible Candidates matrix ?? nonlinear system

if i have function

P = GenCand ( x , y , k , l , Order )

how i can Calculate the no of Candidates terms?

i wrote this

NoTerms = (1 + (k + 1) + l + size( combsrep( 0 : k , Order) , 1 ) + size( combsrep( 1 : l , Order) , 1 ) + ... 
    (k + 1) * l;

but i got error

 Expression or statement is incorrect--possibly unbalanced (, {, or [.

please help me

Answer 1

[Walter Roberson]

In the below, under each (| and |) I put a digit indicating the number of active bracket levels "after" the character above it.

 NoTerms = (1 + (k + 1) + l + size( combsrep( 0 : k , Order) , 1 ) + ...
           1    2     1           2         3              2     1
    size( combsrep( 1 : l , Order) , 1 ) + ... 
        2         3              2     1
    (k + 1) * l;
    2     1

so somehow we have reached the end of the line having started one more (| than you have matching |)

[AHMED ALRASHEDY]

thank you soooooooo much