3-x/x+3
    4a^2＋24a＋9＝0
    x/x-2
    0.000196 = 63*x^(1/2)*e^((0.715x-3490)/323)
    45x^2-640x+2080=0
    x+5=2/1x+3-2x
    x＋（x－0.06）*0.25=0.26
    x＋（x－0.6）*0.25=0.26
    （x^3）+（22.4*10^7*x^2）+（1.9456*10^16*x）+（159.962*10^21）=0
    0.000196＝63*x^(1/2)*e((0.715x-3490)/323)
    x＋（x－6%）*25%=26%
    (2x/49)^2-4*((1/25)+(1/49))*(((x^2)/49)-1)=0
    x^2(x-3)=20230601
    13X＋11（104－X）＝1240
    1/x^arcsinx
    cosx^1/sin-1/2x^2
    5x*x-12x=0
    12÷x=12÷（4+x）+4
    6x＝x＋25
    6x＝x＋25

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