The water level measured by the hydrological station was +2cm at 8:00 am, rose 3cm at 10:00, rose 2cm at 12:00, dropped 4cm at 2:00pm, and dropped 3cm at 4:00pm. What is the water level recorded at this time?
水文站上午8时测得水位为﹢2cm，10时水位上升3cm，12时上升2cm，下午2时水位下降4cm，下午4时水位又下降3cm，这时水位记录为多少．
<gadget id="calculator">2 - 4 - 3</gadget>
<output>-5</output>

<gadget id="calculator">2 + 3 + (-5)</gadget>
<output>0</output>

<result>0</result>