What is 3 over 7 minus negative 6 over 7?

When was The Time Machine Did It created? What is a muzzle on a gun? Can you eat hamburger frozen for 2 years? How much to sell super Mario all stars at gamestop? How do you write 109230 in expanded form? How big is a water boatman? Where was Joshua the son of Nun when the people made the golden calf? Is fermentation a good way to produce atp? How many Tonnes of asphalt in 1 cm? What does MCL 750.243a state? Bank of America mission statement? Where can you find a private owner selling a car for under 600? Is vacuum an insulator or a conductor? In the eyes of the international community China what? What is the zip code to where Chris Brown lives? What are the working conditions for a bounty hunter? Does your blood flow clockwise? What are 3 different names for pancakes? How can you tell by looking at an equation that it is an acid? Does squidward tentacles have a tattoo?