Expression 2: "x" Subscript, "k" , Baseline equals left bracket, negative 2 , negative 1 , 0 , 1 , right bracketxk=−2,−1,0,1
2
Expression 3: left parenthesis, "x" Subscript, "k" , Baseline , "L" Subscript, 2 , Baseline left parenthesis, "x" Subscript, "k" , Baseline , right parenthesis , right parenthesisxk,L2xk