Calculation: 1258+1436-2599+1475=how much.
计算：1258+1436-2599+1475=多少．
<gadget id="calculator">1_436 - 2_599</gadget>
<output>-1_163</output>

<gadget id="calculator">1_258 + (-1_163) + 1_475</gadget>
<output>1_570</output>

<result>1_570</result>