To Clear the definitions let's assume that:
M=1010001101 (k=10) and,
P=110101 (n+1=6)
Then the FCS to be calculated by the transmitter will be n=5 bits in length. Lets assume that the transmitter has calculated the FCS to be:
F=1110 (n=5)
Then the transmitted frame will be:
T=1010001101 1110