$x >= $x_min and $x <= $x_max and $y >= $y_min and $y <= $y_max #### ($x >= $x_min and $x <= $x_max) and ($y >= $y_min and $y <= $y_max) #### $x >= $x_min and $x <= $x_max and $y >= $y_min and $y <= $y_max #### $x_min <= $x and $x <= $x_max and $y_min <= $y and $y <= $y_max