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-300/(x^2)
5/7 = 25/35
ln(x^2-1)
4.2*x
100/c
| (-2y^3/5)^2 | | -(4g-20)-8=28 | | -9x+5x-8x=0 | | 30k=7 | | 9x=130-22 | | -5(e-10e)=30e+15 | | 2(5x-8)-7=4(1-2x)-3(X+2) | | 9x+2x+11=44 | | 4s-15s=33 | | -14a+2=40-2(4a+1) | | 0.4y+3=1.2y-9 | | 8z+14z=88 | | 5b+6(-10+9b)=10b+38 | | 6x-10=2x-34/5 | | 5k=85 | | 21+8r=3(7r+4)-4r | | x+10+8x-10+90=180 | | 36+2y=3(4y+20) | | x+10=8x+10 | | 3x^2=1800-5x^2 | | 120y-0.1x=0 | | (-3x-9)(x-7)=0 | | 4.3-1.4[p+7]=9.7 | | -6-8=5x+8-4x | | -16/x-3=-10/x | | 3-9(m+3)=-4m-5m-24 | | 2x^2=120-8x | | 56=7(4+x) | | 5n-20=10(n+2) | | 9=-4(3x+1)+13x | | 5(X+1)-3(2X+3)=3(x+5) | | d=144-16t |