Calculation: (105*95+103*97)-(107*93+101*99)=how much.
计算：(105*95+103*97)-(107*93+101*99)=多少．
<gadget id="calculator">105 * 95</gadget>
<output>9_975</output>

<gadget id="calculator">103 * 97</gadget>
<output>9_991</output>

<gadget id="calculator">9_975 + 9_991</gadget>
<output>19_966</output>

<gadget id="calculator">107 * 93</gadget>
<output>9_951</output>

<gadget id="calculator">101 * 99</gadget>
<output>9_999</output>

<gadget id="calculator">9_951 + 9_999</gadget>
<output>19_950</output>

<gadget id="calculator">19_966 - 19_950</gadget>
<output>16</output>

<result>16</result>