Complex sentence: The SRA, however, did not agree to the terms required, such as the lengthening of platforms changes to railway infrastructure, and so the 32 five-car sets was cancelled and an extra 10 four-car sets were added to the order.
Split into simpler sentences: The SRA, however, did not agree to the terms required, such as the lengthening of platforms and changes to railway infrastructure. As a result the 32 five-car sets were cancelled and an extra 10 four-car sets were added to the order.