Please capitalize where necessary: 123 mp3 cd burner is a cd-burning software that enables you quickly and easily to create your own custom audio cds from existing mp3 or wav files on your system.
A: 123 MP3 CD Burner is a CD-Burning software that enables you quickly and easily to create your own custom audio CDs from existing MP3 or WAV files on your system.
Q: the cell controls, which genes are active and which are inactive.

A: The cell controls, which genes are active and which are inactive.
Q: vitamin d: vitamin d appears to have anti-tumor effect against prostate cancer.
A: Vitamin D: Vitamin D appears to have anti-tumor effect against prostate cancer.
Problem: notably higher floating-point performance
Can you repeat this sentence, but capitalize it?
Answer: Notably higher floating-point performance
Text: if the workingman had done anything like that, the lordly person would have had an article in the newspaper the next day denouncing the anarchist.

Correct capitalization: If the workingman had done anything like that, the lordly person would have had an article in the newspaper the next day denouncing the anarchist.
Q: the thing is that you also mentioned that you want to upgrade a telephone commodity.
A:
The thing is that you also mentioned that you want to upgrade a telephone commodity.