"You shall teach them diligently to your sons and shall talk of them when you sit in your house and when you walk by the way and when you lie down and when you rise up." (Deuteronomy 6:7)

The literal commandment is that we should teach G-d's commandments diligently to our children. However, in order to be able to teach the commandments we have to learn them first.

"You shall rise up before the grayheaded and honor the aged, and you shall revere your God; I am the LORD." (Leviticus 19:32)

The literal commandment is to rise up (stand) before the grayheaded and honor the aged.

"Now therefore, write this song for yourselves, and teach it to the sons of Israel; put it on their lips, so that this song may be a witness for Me against the sons of Israel." (Deuteronomy 31:19) The literal commandment is that we should write the song of Moses" (Deuteronomy 32:1-43) for ourselves.

"Whatever I command you, you shall be careful to do; you shall not add to nor take away from it." (Deuteronomy 12:32)

Do not increase the number or expand the scope of any of G-d's commandments.

"Whatever I command you, you shall be careful to do; you shall not add to nor take away from it." (Deuteronomy 12:32)

Do not decrease the number or diminish the significance of any of G-d's commandments.