If formula

Hanna1701.... You need to explain your intended logic.  And it would be best to attach an Excel file that demonstrates the problem.  I cannot read your image.

The form of an IF expression is:

IF(condition, value_if_true, value_if_false)

So the first part of your formula is a complete IF expression, to wit (removing unnecessary parentheses):

IF(AND(D4>0,E4>0), c4-d4, c4)

That says.... If D4>0 and E4>0, return C4-D4; otherwise, return C4.

Given that, it is unclear what your intent is for the rest of the formula, which is badly formed, to wit (removing last parenthesis, which is incorrect syntax):

=IF_expression, c4+e4, c4

We cannot put 3 expressions, comma-separated, into a formula.  And I'm sure that is not your intention.

Perhaps you meant to write a nested IF expression, with another condition (TBD).  The intended form might be:

IF(AND(D4>0,E4>0), c4-d4, IF(condition, c4+e4, c4))

That says....  If D4>0 and E4>0, return C4-D4.  Otherwise, if "condition" is true, return C4+E4; otherwise, return C4.

So C4 is returned if both "D4>0 and E4>0" is false (i.e. D4<=0 or E4<=0 or both) and "condition" is false.