To make the equation true by adding parentheses, the key is to group operations in a way that satisfies the given result. The equation is:

$3 + 2^2 - 5 \times 4 - 2/2 + 3 = 23$

By adding parentheses, the equation can be rewritten as:

$3 + (2^2 - 5) \times (4 - 2/2) + 3 = 23$

Let's simplify step-by-step:

1. First, calculate the exponents:
   $2^2 = 4$

2. Replace the value and simplify inside the first parentheses:
   $3 + (4 - 5)\times(4 - 1) + 3$

3. Calculate inside the second parentheses:
   $3 + (-1)\times(3) + 3$

4. Multiply:
   $3 - 3 + 3 + 3 = 6$

The parentheses are incorrect. However, we can attempt another grouping that would satisfy the equation:

$3 + ((2^2 - 5) \times (4 - (2/2))) + 3 = 23$

This simplifies to:

1. Calculate $2^2 = 4$, so: $3 + ((4 - 5) \times (4 - 1)) + 3 = 23$

2. Simplifying further: $3 + (-1 \times 3) + 3 = 23$

Again, this is incorrect. Let's try the following grouping:

$3 + (2^2 - 5) \times (4 - 2)/2 + 3 = 23$

This simplifies to:

1. Calculate $2^2 = 4$, so: $3 + (4 - 5) \times 2 - 2/2 + 3 = 23$

2. Simplify further: $3 + (-1 \times 2) - 1 + 3 = 23$

This still doesn't yield 23. Given the complex nature of the operations, if there's a specific expected outcome or other constraints, I may need those details to determine the correct placement of parentheses.

Would you like to provide more details, or should I keep refining this? Here are some questions to deepen understanding:

1. Should the solution strictly use all operations?
2. Can I add parentheses in multiple places?
3. Is this a school assignment?
4. Would you like a breakdown of each potential operation?
5. Are you looking for other possible solutions?

Tip: When adding parentheses, start by identifying the highest priority operation in the desired outcome equation.