\[\boxed{\text{613\ (613).}\text{\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
\[если\ \ x = 1,4;\ \ y = 0,157:\]
\[x^{2} - y = {1,4}^{2} - 0,157 =\]
\[= 1,96 - 0,157 = 1,803.\]