（20+2x)(15+2x)-15×20＝246
    4×（x-8）²＝400
    4（x-8）²＝400
    x(x-1)=66*2
    (x*2*0.95)/3=33.8
    40x^2-30x+5=0
    30x^2-30x+5=0
    x*【120-0.5*(x-60)】=8800
    120x-0.5(x-60)=8800
    (x*2*0.75)/2=33.8
    x*2*0.75=33.8
    (x*2)/3=33.8
    25x*x+20x+4=0
    y^3+y=2
    5x*x+x=7
    x^-5
    x(x-3)+5=0
    1000x+1=（1+x）^30
    1+x=2
    9*x*x+6x+1/9=0

Home page << page837 page838 page839 page840 page841 ... ... page843 page844 page845 page846 page847 >> Last page 31237 pages in total