MATLAB: Can’t i integrate this function

So, here's my code:

syms w k c l Vi Vr p wr wi

l = (Vr-Vi)/Vi;

p = w/wr;

fw = ((k*l*Vi)/c)*(((1+p*l)*Vi)/c)^(k-1)*exp(-((1+p*l)*Vi)/c)^k ;

f1 = wi-w;

f2 = w-wi;

fr = (f1*fw);

fp = (f2*fw);

CCr = int(fr,w);

CCp = int(fp,w);

w is the only real variable. The others ( k,c,l,Vi,Vr,p,wr,wi) are constants, but i need the answer without using the values of these.

When i try to use the ''int'' it doesn't integrate and returns int(fw,w).

Thank you 🙂