Please capitalize where necessary: material: aisi 304 stainless steel.
A: Material: AISI 304 stainless steel.
Q: small boards for the manufacture of pencils 4408 90 35 (mtq)

A: Small boards for the manufacture of pencils 4408 90 35 (MTQ)
Q: several models of local and regional energy agencies coexist. most agencies and their networks could be eligible and will be encouraged to sign the pledge and to become active supporters of the covenant of mayors initiative, with the exception of those for-profit agencies, with a project-by-project mandate and mostly privately financed.
A: Several models of Local and Regional Energy Agencies coexist. Most Agencies and their networks could be eligible and will be encouraged to sign the pledge and to become active supporters of the Covenant of Mayors Initiative, with the exception of those for-profit agencies, with a project-by-project mandate and mostly privately financed.
Problem: these 5 guys are the best dressed rock and rollers in the business engaging the audiences of through out the world with songs about madness, idiots walking and sex.
Can you repeat this sentence, but capitalize it?
Answer: These 5 guys are the best dressed rock and rollers in the business engaging the audiences of through out the world with songs about madness, idiots walking and sex.
Text: first the bank, caisse nationale des caisses, put its 44 percent of the shares up for sale.

Correct capitalization: First the bank, Caisse nationale des Caisses, put its 44 percent of the shares up for sale.
Text: a minimal surface is characterized by having a total curvature equal to zero in every point.

Correct capitalization:
A minimal surface is characterized by having a total curvature equal to zero in every point.