<em>i think it's just simply</em> y - 7 <em>?</em>
According to the equation located here: https://www.1728.org/glwarmng.htm burning one gallon of gasoline produces 19.3 pounds of carbon dioxide.
So, if a car gets 37 miles per gallon and if it travels 400 miles, it will use 10.81 gallons of gasoline and will produce 19.3 * 10.81 = 208.63 pounds of carbon dioxide.
If the numbers supposed to be multiplied together the answer is 7.82 x 10^14
53-(64:8)+102=53-8+102=147
