function of m and t solution plot

hw question is below my work. please give recommendations for how to correct the code.

t=-5:0.01:5;

n=20;

m=1:n;

y=((t.^m)(m.^2)/((e.^mt)-e^(-mt));

hold on

plot(t,y)

Answer 1

[David Hill]

t=-5:0.01:5;
n=20;
hold on;
for m=1:20
  y=(t.^m)*m^2./(exp(m*t)-exp(-m*t));
  plot(t,y)
end

[N/A]

Thank you!