To simplify the given expression, we will perform the operations inside the parentheses first, then multiply the result:

20, (88:18) + (45:0), 36
20, 4 + undefined, 36
20, undefined, 36

Now, we cannot divide by zero, so the expression is undefined.

Next, we will multiply the undefined result by the second set of numbers:

Undefined (15, 59) + (15, 95)
Undefined 15, 59 + 15, 95
Undefined, 59 + 15, 95
Undefined, 74, 95

Therefore, the final simplified expression is Undefined, 74, 95.