Which of these is not a power of the president?

make laws
veto laws
oversee the military
make official appointments

The president cannot make laws. Only the legislative branch (the Congress) can make laws. But the president can certainly veto laws and make official appointments. And as commander-in-chief of the military, the president also oversees the armed forces. So the only power in your list that the president does NOT have is to make laws.

A compromise was reached. On March 3, 1820, Congress passed a bill granting Missouri statehood as a slave state under the condition that slavery was to be forever prohibited in the rest of the Louisiana Purchase north of the 36th parallel, which runs approximately along the southern border of Missouri.