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10/28-(8/28)
14/28-(8/28)
2*cos((2*pi)/3)
3*(21/4)-(7*(21/4))-11
75000/60
| -78=-1-(7h+7) | | (x+2)(x+3)=x(2)+5x+6 | | 2/3.3/5= | | 1.75+0.65=10 | | 25-30x= | | 10/28-8/28 | | 6xy^-2/x^-3=6x | | -4y+5x=23 | | 90=3x+5x+2 | | 14/28-8/28 | | (x^6y^3)^(1/3) | | F(x)=0.54x+0.68 | | 50-40=10+a | | 1/15s=6 | | -7x(-3y+8)-6y=4 | | 1/2x=13/10 | | 3x^2*9x^0= | | X*1/8=64 | | 1/2x×13/20 | | Y=5x*2+10 | | 3(j+9)=45 | | 2w(-2w^2+19w+2)=0 | | 17=3(b+3)-b | | 5w(-7w+3)=0 | | ln(4)-ln(x)=-0.14 | | 6(x+24)=4 | | 2x+8-15=-2(3x-82) | | 169=x | | -21=-v/9 | | 72r=12 | | 2cos(2pi/3) | | 72f=12 |