7 * 3.2 = 22.43.2 + 3.2 = 6.43.2^2 = 10.244.9 * 6.8 = 33.32

Adding all the results together:
22.4 + 6.4 + 10.24 + 33.32 = 72.36

Therefore, 1.73.2+3.2^2+4.96.8 = 72.36.