You can need to learn about operator precedence and associativity in Programming Languages. That way you can strengthen your understanding of how to perform complex calculations in Python.
Apart from that try to break the problem into smaller subproblems and combine the smaller subproblems to generate solution for the larger problem.
[0.38C(1-g/C)2] = (0.38 * C) * (1 - (g/C) * 2)
[1-(g/C)(X)] = (1 - (g/C) * X)
173X2 = 173 * 2
[(X-1)+[(X-1)2 + (16X/C)]1/2] = ((X-1)+((X-1)*2 + (16*X/C))* 1/2)
Now put all values in the equation:
"d=[0.38C(1-g/C)2]/[1-(g/C)(X)]+173X2[(X-1)+[(X-1)2 + (16X/C)]1/2]"
d = (((0.38 * C)*(1 - (g/c)) * 2 ) / (1 - (g/C) * X)) + 172 * 2 *((X-1) +((X-1)+((X-1)*2 + (16*X/C))* 1/2)