What is this......

Lin Zhaoxia was speechless, the corners of his lips twitched twice, but he still quickly calculated, "I{x2+9y2+z2-1}3-x2-z3-9y2z3=0U 80/80." ”

But as soon as the formula is finished...

"Cold Male God, Sweet and Warm" Chapter 1839 There is a mathematical formula for you to calculate (3) is in the hand, please wait a moment,

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