98-(2•1)+34:4-23+89

Let's break down the expression step by step, according to the order of operations (PEMDAS/BODMAS):

1. Parentheses/Brackets
2. Exponents/Orders
3. Multiplication and Division (from left to right)
4. Addition and Subtraction (from left to right)

The expression is:

\[ 98 - (2 \cdot 1) + 34 \div 4 - 23 + 89 \]

Now, evaluate the parts step by step:

1. Calculate \(2 \cdot 1 = 2\).

   So the expression now is: \[ 98 - 2 + 34 \div 4 - 23 + 89 \]

2. Next, calculate \(34 \div 4 = 8.5\).

   Now we have: \[ 98 - 2 + 8.5 - 23 + 89 \]

3. Now we perform the addition and subtraction from left to right:

   • Start with \(98 - 2 = 96\)
   • Then \(96 + 8.5 = 104.5\)
   • Next \(104.5 - 23 = 81.5\)
   • Finally \(81.5 + 89 = 170.5\)

So, the final result is: \[ \boxed{170.5} \]