Analyze the mathematical expressions from the image.

Mathematical Expressions:

• a) \[ \int_{x \ge -1}^{x \ge 0} (3x - 4) dx \]
• b) \[ x \le -1 \]
• c) \[ -x^2 \]
• d) \( s2 \)

Note: The notation in 'a' appears to be a single integral with compound limits, which is unusual. Typically, limits are single values or ranges. The expression 's2' in 'd' is unclear in a mathematical context and might be a label or a different type of notation.