Indication of these intervals will inform the user about necessary servicing

Can you repeat this sentence, but add in punctuation?
Indication of these intervals will inform the user about necessary servicing.
That may be a sobering statistic but what is heartening is that an estimated 68 million Americans donate blood every year So should you consider becoming a donor too

Can you repeat this sentence, but add in punctuation?
That may be a sobering statistic, but what is heartening is that an estimated 6.8 million Americans donate blood every year. So should you consider becoming a donor too?
You used the right rear axle shaft or shorten the front

Can you repeat this sentence, but add in punctuation?
You used the right rear axle shaft or shorten the front?