question: whatever may have produced the dislike to euclid in the illustrious mathematician..., there is no ground for supposing that he would have been better pleased with the substitutes which are now offered and recommended in its place.
Capitalize this past sentence correctly.
A: Whatever may have produced the dislike to Euclid in the illustrious mathematician..., there is no ground for supposing that he would have been better pleased with the substitutes which are now offered and recommended in its place.

question: an icon for “play” is imposed on certain images of churches and wall paintings.
Capitalize this past sentence correctly.
A: An icon for “play” is imposed on certain images of churches and wall paintings.

question: did someone email you a toast file and you're not sure how to open it? maybe you have found a toast file on your computer and wondering what it's for? windows might tell you that you can't open it, or in the worst case, you might encounter a toast file related error message.
Capitalize this past sentence correctly.
A: Did someone email you a TOAST file and you're not sure how to open it? Maybe you have found a TOAST file on your computer and wondering what it's for? Windows might tell you that you can't open it, or in the worst case, you might encounter a TOAST file related error message.