48 : 6 * 4 + 6 * 9 - 26 + 13

Let's solve the expression step by step, following the order of operations (PEMDAS/BODMAS):

1. Multiplication and Division (from left to right):
* $$48 : 6 = 8$$
* $$8 \cdot 4 = 32$$
* $$6 \cdot 9 = 54$$
2. Now the expression looks like this:
$$32 + 54 - 26 + 13$$
3. Addition and Subtraction (from left to right):
* $$32 + 54 = 86$$
* $$86 - 26 = 60$$
* $$60 + 13 = 73$$

Answer: 73