Wow you're a helpful troll, aren't you? For such a smart ass you don't seem to know the difference between a double definite integral and a double integral; 3 clicks after googling shows me how to enter a double integral only.
No bondo for my beater; I bought a replacement quarter panel to weld on
Best to consult Rubens Car Talk Forum before you grind and weld around that gas tank and rear shock.Rube can advise(2010 Golden Hammer Beater-Automotive Award Winner) with sound effects included.Avoid too much salon product in that wild hair-do when you weld also.
Never good to die a virgin kid.