Question

упростите выражение (1/y-1/x+y):x/y

Answer 1

$( frac{1}{y} - frac{1}{x} + y) div frac{x}{y} = ( frac{x}{xy} - frac{y}{xy} + frac{x {y}^{2} }{xy} ) times frac{y}{x} = frac{x - y + x {y}^{2} }{xy} times frac{y}{x } = frac{x - y + x {y}^{2} }{ {x}^{2} }$