Consider the following question.
74years9month&12years4months
74years9months+12years4months
86years13months
87years1month
Hence, this is the required answer.
2 years and 4 months can also be expressed as 2+412 years
2 years and 4 months can also be expressed as 2212 years.
2 years and 4 months can also be expressed as 2 + 412