Interpret the mathematical expressions and number line shown in the image.

The image displays mathematical expressions related to number sets and inequalities.

• The first line shows an inequality: x <= -3. This means all numbers less than or equal to -3.
• Below the inequality, a number line is depicted. A solid dot is placed at -2, and shading extends to the right from it, indicating numbers greater than or equal to -2. The number 4 is also indicated on the number line. There are also markings at -2 and 4.
• The second line presents two closed intervals: [-4, 5] and [-3, 6]. The square brackets indicate that the endpoints are included in the intervals.
• The third line shows two open intervals: (-inf, 5) and (1, inf). The parentheses indicate that the endpoints are not included in the intervals, and 'inf' denotes infinity.