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7;420;1;5040
1;126;1;5040
7;252;1;5040
1;21;1;5040
42;1680;1;5040
| 3x=X-2x | | 25*30=20x | | 8x+2=9x-7.20 | | 1x+2X+4X=28 | | 21*27=14x | | 3x+8=3(x+5) | | x^3+3x^3-4x=0 | | 5x-1+5x-2=30 | | 30*27=18x | | 2x-2x-2=6 | | 7a+4b+3=23 | | 3x+2-3x=72 | | 5a+2=47 | | 2x-2x-2=72 | | 2x+1+2x-1=20 | | sin(pi/4x)=0 | | X^2-14x-89=0 | | x+1/x-3= | | 5x-2*5x+3=125 | | 4+6*2= | | (3-6)*2+5= | | (X-1)x-(2x-6)(x+2)=0 | | z/10-3=7 | | z/9-2=6 | | 4+6(2+1)+6= | | 6*3+1-7*3x+2=3x+2-3x+4+1 | | 3x(6+4)-30= | | 2x=13+8-x | | 32x=10x | | 7x^2+42=-7 | | px+qx+py+qy= | | 31-4x=7-8x |