The temperature in a certain place at 8:00 is -4°C. After 4 hours, the temperature rises by 9°C, and after 5 hours the temperature drops by 3°C. What is the current temperature in °C?
某地8时的气温是-4℃，经过4小时，气温升高9℃，经过5小时气温下降3℃，现在的温度是多少℃．
<gadget id="calculator">9 - 3</gadget>
<output>6</output>

<gadget id="calculator">(-4) + 6</gadget>
<output>2</output>

<result>2</result>