Please capitalize where necessary: my band jersey will be a rectangle 38 cm by 24 cm.
A: My band jersey will be a rectangle 38 cm by 24 cm.

Please capitalize where necessary: it has received positive reviews from many customers who have not once been disappointed.
A: It has received positive reviews from many customers who have not once been disappointed.

Please capitalize where necessary: hear how flex helps you build trust with your patients.
A: Hear how Flex helps you build trust with your patients.

Please capitalize where necessary: preparation – as regards both material and form – can be indicated – in preliminary form.
A:
Preparation – as regards both material and form – can be indicated – in preliminary form.