When the work measures 2729333435 cm cast off 8 sts each side for the arm holes ie 4 sts each side of the MT 132144148160172 sts left in total for the back and the front piece

Could you correct the punctuation please?
When the work measures 27-29-33-34-35 cm cast off 8 sts each side for the arm holes (i.e. 4 sts each side of the MT) = 132-144-148-160-172 sts left in total for the back and the front piece.