Complex sentence: This development will include four mixed-use, state of the art luxury towers; it is believed that the tallest one will reach a height of 400 metres while two of the others will exceed 300 metres.
Split into simpler sentences: This development will include four mixed-use, state of the art luxury towers. It is believed that the tallest tower will reach a height of 400 metres while two of the others will exceed 300 metres.