For the convenience of calculation, sometimes some fractions can be rewritten into the form of adding or subtracting two or more fractions, such as: (5/6)=(1/2)+(1/3), (1/ 12)=(1/3)-(1/4). Please use your ingenuity to calculate: (1/6)+(2/15)-(3/10)+(4/21)-(5/24)+(6/91)=how much.
为了计算方便，有时可把一些分数改写成二个或二个以上的分数相加或相减的形式，如：(5/6)=(1/2)+(1/3)，(1/12)=(1/3)-(1/4)．请发挥你的聪明才智计算：(1/6)+(2/15)-(3/10)+(4/21)-(5/24)+(6/91)=多少．
<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">2 / 15</gadget>
<output>2/15 = around 0.133333</output>

<gadget id="calculator">3 / 10</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">(2/15) - (3/10)</gadget>
<output>-1/6 = around -0.166667</output>

<gadget id="calculator">4 / 21</gadget>
<output>4/21 = around 0.190476</output>

<gadget id="calculator">5 / 24</gadget>
<output>5/24 = around 0.208333</output>

<gadget id="calculator">(4/21) - (5/24)</gadget>
<output>-1/56 = around -0.017857</output>

<gadget id="calculator">6 / 91</gadget>
<output>6/91 = around 0.065934</output>

<gadget id="calculator">(1/6) + (-1/6) + (-1/56) + (6/91)</gadget>
<output>5/104 = around 0.048077</output>

<result>5/104 = around 0.048077</result>