Add punctuation: Infrastructure costs drop to an average of 279 per device 73 less than the cost of the composite alternative
A: Infrastructure costs drop to an average of $279 per device, 73% less than the cost of the composite alternative.

Add punctuation: 16 Moses Special Egyptian Forces 128
A: 16: Moses' Special Egyptian Forces 128

Add punctuation: A few days after Leibniz presented his dissertation his mother died
A:
A few days after Leibniz presented his dissertation, his mother died.