Please capitalize where necessary: we can custom produce your bags or provide immediate delivery from our large selection of in stock products. you have the choice of a wide variety of materials:
A: We can custom produce your bags or provide immediate delivery from our large selection of in stock products. You have the choice of a wide variety of materials:
Q: as you begin to fall downward and the weight of you body pulls on a grab bar, your hand is more likely to slip downward on a vertically installed bar.

A: As you begin to fall downward and the weight of you body pulls on a grab bar, your hand is more likely to slip downward on a vertically installed bar.
Q: a manufacturer of led fireworks light fwl04 at guangdong china.
A: A manufacturer of led fireworks light FWL04 at GuangDong China.
Problem: carbs guide to repair and maintenance
Can you repeat this sentence, but capitalize it?
Answer: Carbs Guide to repair and maintenance
Text: using a fast spin also extracts water, meaning that the clothes come out nearly dry. generally, anything over 1000 rpm is very good.

Correct capitalization: Using a fast spin also extracts water, meaning that the clothes come out nearly dry. Generally, anything over 1000 rpm is very good.
Problem: brashman became professor of applied mathematics in moscow in 1834.
Can you repeat this sentence, but capitalize it?
Answer:
Brashman became professor of applied mathematics in Moscow in 1834.