raise c to the 2nd power, add the result to 8, then subtract what you have from d

raise c to the 2nd power, add the result to 8, then subtract what you have from d

Raise c to the 2nd power:
c^2

Add the result to 8:
c^2 + 8

Subtract what you have from d:
d - (c^2 + 8)