function x=expf1(t,terms)
x=0.5;
count=1;
while count <= terms
	coeff = (1-exp(-j*count*));
    harmonic = coeff*exp(-j*count*pi*t);
    % negate count to get the negative harmonic
    count = -count;
   	coeffneg = 2*sinc(count*pi/2) * exp(-j*count*pi/2);
    harmonicneg = coeff*exp(-j*count*pi*t);
    % negate count again to continue in the loop
    count = -count;
    
	x=x + harmonic + harmonicneg;
    count = count+1;
end