A 20 year old male reports that he has a poor appetite and t…

A 20 year old male reports that he has a poor appetite and that food causes discomfort when he swallows for the past 2 years. The patient is worried that he ate something that was rotten or spoiled this morning, because he vomited and it looked like coffee grounds. Which health problem would the care team first suspect?

Simplify the rational expression x-55-x{“version”:”1.1″,”mat…

Simplify the rational expression x-55-x{“version”:”1.1″,”math”:”<math style="font-size:24px" xmlns="http://www.w3.org/1998/Math/MathML"><mfrac><mrow><mi>x</mi><mo>-</mo><mn>5</mn></mrow><mrow><mn>5</mn><mo>-</mo><mi>x</mi></mrow></mfrac></math>”}