Perform the operation and simplify the result when possible. 
Definitions:
Express
Express refers to a mode of communication or transportation that is fast and direct.
Condition
A specific requirement or stipulation that must be met for a contract or agreement to become effective or for certain actions to be taken.
Vehicle
A means of transporting goods or persons, typically on land, such as cars, trucks, or bicycles.
Discharge by Performance
The termination of contractual obligations by fully executing the tasks or duties outlined in the contract.
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