Amazon CEO Andy Jassy speaks during the GeekWire Summit in Seattle on Oct. 5, 2021.David Ryder | Bloomberg | Getty ImagesAmazon shares slid more than 3% in extended trading on Thursday after the company reported second-quarter results that exceeded expectations, but it gave light operating income guidance for the current period. Here's how the company did, compared with estimates from analysts polled by LSEG:Earnings per share: $1.68 vs. $1.33 estimatedRevenue: $167.7 billion vs. $162.09 billion...