Answer :

Sure, let's solve the given expression step-by-step:

The expression to solve is:
[tex]\[ \{[18+(15-7) \times 2] \div 17\}+\{52-3(42-15)\} \][/tex]

### Step-by-Step Solution:

1. Simplify the expression inside the first set of square brackets:
[tex]\[ 15 - 7 = 8 \][/tex]

2. Now, substitute this result back into the expression:
[tex]\[ 18 + 8 \times 2 \][/tex]

3. Perform the multiplication inside the square brackets:
[tex]\[ 8 \times 2 = 16 \][/tex]

4. Add the result of the multiplication to 18:
[tex]\[ 18 + 16 = 34 \][/tex]

5. Now, divide by 17:
[tex]\[ 34 \div 17 = 2.0 \][/tex]

6. Next, simplify the expression inside the second set of curly braces:
[tex]\[ 42 - 15 = 27 \][/tex]

7. Now, substitute this result back into the expression inside the curly braces:
[tex]\[ 52 - 3 \times 27 \][/tex]

8. Perform the multiplication inside the curly braces:
[tex]\[ 3 \times 27 = 81 \][/tex]

9. Subtract the result of the multiplication from 52:
[tex]\[ 52 - 81 = -29 \][/tex]

10. Finally, add the results from both parts:
[tex]\[ 2.0 + (-29) = -27.0 \][/tex]

So, the final result of the expression [tex]\(\{[18+(15-7) \times 2] \div 17\}+\{52-3(42-15)\}\)[/tex] is:
[tex]\[ -27.0 \][/tex]