Welcome to the wonderful world of STACK! Entering your answers into STACK isn't particularly hard, however there are a few nuances to the way that STACK accepts your answers, so lets dive right in! If you are familiar with entering mathematical expressions or formulas into a spreadsheet, you will find that entering them into STACK is very similar. In the box below, enter the equation y = 5x + 2. (Remember to use an asterisk, i.e. *, to denote multiplication!)