MATLAB: Can’t find the error in the code

Hello everyone,

First I want to thank any help :).

I'm having trouble with my code, please help:

TS = @(x) 1 – 4*x + 4*x^2 – 2.67*x^3 + 1.33*x^4;

p1 = 1;

p2 = 0;

RelErr1 = abs ( (TS(p1) – 2*(exp^(-2*p1))) / (2*(exp^(-2*p1))));

RelErr2 = abs ( (TS(p2) – 2*(exp^(-2*p2))) / (2*(exp^(-2*p2))));

Sorry about the two thousand parenthesis, they represent my frustation :).