Question: his son erwin was suspected of being involved in the plot to assassinate hitler on 20 july 1944 and was executed by the gestapo early in 1945.
Answer: --> His son Erwin was suspected of being involved in the plot to assassinate Hitler on 20 July 1944 and was executed by the Gestapo early in 1945.

Question: you have to invent maths to get a solution to a problem but, in the process, i often discover a whole lot more which i didn't expect.
Answer: --> You have to invent maths to get a solution to a problem but, in the process, I often discover a whole lot more which I didn't expect.

Question: for buyers of traditional and customised packages , today's proposal will bring:
Answer:
--> For buyers of traditional and customised packages , today's proposal will bring: