question: he did, however, write a number of important papers which were influential in the development of mathematics, in particular he wrote memoire sur les integrales definies euleriennes in 1840.
Capitalize this past sentence correctly.
A: He did, however, write a number of important papers which were influential in the development of mathematics, in particular he wrote Memoire sur les integrales definies euleriennes in 1840.

question: for most people, the children this is the meaning of life, because they are hidden all the hopes of their parents.
Capitalize this past sentence correctly.
A: For most people, the children this is the meaning of life, because they are hidden all the hopes of their parents.

question: each time there is a birth in the family, all the dead members of the family come alive for one hour. the opera was concieved as a multi-media opera, with many specially created film sequences.
Capitalize this past sentence correctly.
A: Each time there is a birth in the family, all the dead members of the family come alive for one hour. The opera was concieved as a multi-media opera, with many specially created film sequences.