sec(8^5^3)6/46-79+1!*7 = ?
What does "sec" stand for? Did you make an attempt to solve it? If yes, then what happened? If no, why not?. Where does the difficulty lie? Try separating the numerator from the denominator in a very clear fashion, and then go step by step. If you get stuck, then let us know where your problem is. Good luck.
