question: several scientific research have verified this theory, proving that consumers wouldn’t have to be concerned about future health issues with continued application of the product.
Capitalize this past sentence correctly.
A: Several scientific research have verified this theory, proving that consumers wouldn’t have to be concerned about future health issues with continued application of the product.

question: all comments below have been left by people who have spent some time in a hot and sexy show, via live webcam with tessxsexy
Capitalize this past sentence correctly.
A: All comments below have been left by people who have spent some time in a hot and sexy show, via live webcam with TessXsexy

question: this conviction of hers had been supported by her results on many-valued and non-classical logics, especially on applications of various generalisations of post algebras to logics of programs and approximation logics.
Capitalize this past sentence correctly.
A: This conviction of hers had been supported by her results on many-valued and non-classical logics, especially on applications of various generalisations of Post algebras to logics of programs and approximation logics.