5:7+45

Assuming ":" means division (5/7) plus 45:

• 5/7 + 45 = 5/7 + 315/7 = 320/7
• In mixed form: 320/7 = 45 5/7
• Decimal: ≈ 45.7142857

So the result is 320/7 (≈ 45.7143). If you meant a different grouping, let me know.