If the Degree of the Polynomial is N then CRC Generator will be of Degree N+1 bits And CRC Will be N bits.
The message is Given as M(x) = x7 + x4 + x3 + x Then Message bits = 10011010
CRC Generator G(x) = x3 + x2 +1 = 1101
Then CRC(After performing XOR operation or Modulo 2 operation Between Message and CRC Generator) = 001
So , the message We have to send is
Message CRC Bits