x^2=(x+1)^2
    x=x+1
    0.625x+250=-x
    40（1+x）²=48.4
    （X-12207.66）*30=12958
    （12207.66-X）*30=12958
    950=60*（1+x）^10+1000*((1-(1+x)^10)/x)
    8*x^3-6*x+1=0
    x^5-5*x^3+5*x-1=0
    x^3-3*x+1=0
    100*x*222.64/(x*222.64+(1-x)*0.5*335.17)=93.388
    z=2^75241514011443544555555555032016343400361160035
    z=cos60*2^75241514011443544555555555032016343400361160035+sin30
    x=3+9*5*5+3-56+-856+5362+256+52656+4529*85+9589*569+98
    x=3
    200/100=x-10%/15%-x
    3-（3a-3）/2=0
    2x-5=1
    （2m-3）/5=（2/3）m-3
    （4x+2）/6-（10x+1）/6=1

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