758685768475+764-8:5*6

To solve the expression 758685768475 + 764 - 8 ÷ 5 * 6, you need to follow the order of operations, often remembered by the acronym PEMDAS:

1. Parentheses
2. Exponents (ie. powers and square roots, etc.)
3. Multiplication and Division (left-to-right)
4. Addition and Subtraction (left-to-right)

The expression does not contain any parentheses, exponents, or multiplication, but it does have a division and addition and subtraction. Therefore, you first handle the division and multiplication, from left to right, then proceed with the addition and subtraction.

First, calculate the division and multiplication (which are of equal precedence, so you do them in the order they appear from left to right): 8 ÷ 5 = 1.6 (Division) 1.6 * 6 = 9.6 (Multiplication)

Now the original expression simplifies to: 758685768475 + 764 - 9.6

Proceed with the addition, and then the subtraction: 758685768475 + 764 = 758685769239

Finally, subtract 9.6 from the result: 758685769239 - 9.6 = 758685769229.4

So, the expression evaluates to: 758685769229.4