9x^2<-48x-63
    12x^2+7<25x
    0<-15x^2-20x-5
    16x+4<20x^2
    46x+9<-5x^2
    -25x^2+7<-30x
    1/3X-1≤0.5X-0.5
    （2^（1-t）-1）/（2^（1-t）+1）+（2^（1-t^2）-1）/（2^（1-t^2）+1）＜0
    x<1
    0<-3x^2+23x-14
    -12x^2+12x+24<0
    54x<-20x^2-36
    12x<9x^2-21
    4x^2-36<10x
    -12x<-2x^2-18
    16x^2-32<-16x
    -3x<2x^2-14
    -68x+72<-16x^2
    4x^2+16x<48
    -20x^2<-18x+4

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