3√4x² * 3√16x² = ?
If it's as simple as I think it is, it's 72x^4... but I doubt it's that simple.

Jody bought 20 shares of amazon at the close price of $121.00. she bought 20 more shares a year later at the price of $127.00. two years later, she sold all of her shares at the price of $133.00. her broker charges $50 for each transaction. after all of these transactions, how much money did jody make?