Is my code for this question correct or not ?

Find and sketch the signal y(t) which is the convolution of the two pairs if signals.

x = (exp(-2*t) - C*exp(-10*t)).*heaviside(t)

h = pi((t-B)/A)

sympref('HeavisideAtOrigin',1);
syms taw t;
A = 3; B = 4; C = 4;
x = (exp(-2*taw) - C*exp(-10*taw)).*heaviside(taw); %input signal
h = rectangularPulse((t-B)-taw/A); %impulse response
  conv= int (x*h, taw, -inf, inf )    %output signal
 SimpleSolution = simplify(vpa(conv))
fplot( conv, [-2  12]);
xlabel("t");
ylabel("(x*h)(t)");
title("the signal y(t) which is the convolution of x(t)and h(t)")