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((-x)^2+1)/((x^2+1)^2)
59;8
(x-8)/(x^2+6)
x/(x^2+1)
(x-8)/((x^2-6)^2)
| q/3-3=1 | | 7n^2-112=0 | | 19z+22=402 | | 1+3k=16 | | 13x+12=272 | | 2v^2-8v-64=0 | | u+3.3=9.25 | | 21z-19=149 | | 2x+y=438 | | 21z-19=60 | | f(0)=6x^2+8x-4 | | 7x+18=60 | | P(d)=2d+13-6 | | x^3+6x^2-26x+1=0 | | P(d)=2d+13 | | (x^2-6x+9)(x^2+36)=0 | | -7+6x=4x+14 | | (6x^2-33x-18)=0 | | 5x^7/7x^5÷25x/21x^3 | | lnx=0.69 | | 6n^2-15n-21=0 | | 4+2z-3=9z+25-3z | | 4x-40=12 | | 5t^2-t-8=0 | | 0.02x-1.4=5.2 | | 10v^2-16v-42=0 | | 3s-4=-1-3s | | X+12=5x-40 | | 6m+4=7(m+1)-2m | | f(x)=8x^11 | | 6x^7+9x^7= | | 8(x+3)=-8x-24 |