How I can get trapz function ?

n: -5:1:5;

w= -pi:0.01:pi;

x_n= [1 9 1 3 0 6 9 9 4 8 0];

h_n= x_n;

X_ejw= symsum(x_n.*exp(-j.*w.*n),-5,5);

H_ejw= X_ejw;

Y_ejw= X_ejw.*H_ejw;

How I can get y[n] with by using trapz function according the following formula ?

[David Hill]

X_ejw does not make sense (array sizes do not match). Describe the function Y.

[Ege Can Çilesiz]

Should it be like this ?

x_ejw= symsum(x_n.*exp(-j.*w.*n),n,-5,5);

y_ejw= symsum(y_n.*exp(-j.*w.*n2),n,-10,10);

[David Hill]

Is Y(x) = x.^2 ?

[Ege Can Çilesiz]

Y(x) = X(x).H(x)

[David Hill]

and H(x)=X(x)? What is the function for X(x)?