6p^2-40p+56=0
    32x^2-(8*32+2)x+16*32+1=0
    2t²-4t=1/2
    4X²-8X=1
    4t²-8t=1
    2X²-8X+9=0
    2X²+6=7X
    （X+1）²-4（X-2）²=0
    4（x+3）²=25（X-2）²
    2（X+1）²-4=0
    2（X-7）²=9/2
    9X²-4=0
    2（X-7）²=2/9
    （x+5）÷50+5
    （2t-1）²=16
    （X+10）÷10
    （X+0.1）÷500
    （X+0.2）÷500
    （X+2）÷500
    （X+5）÷500

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