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| 7r^2-63r+98 | | 9x-2+20x+5+40=180 | | 5.8(11.63).2+36.4 | | 5a+20=4a-20 | | -2x^2-7x-6=0 | | (x^4+x^4)(x^4-x^4)= | | 498.20/94= | | 15x+5+22x+4+120=180 | | 15=(5x-4)2 | | 4x+62=94 | | 5x+10+11x+2+58=180 | | 6*(9+32)= | | 5a-25=4a+16 | | 2x+10=56 | | 3+4=3x | | 2x+2=28 | | -7x-3=-2x+1 | | (4)(5y)= | | 7.81x+81=60.9961+9x | | 8x-4=2x+20 | | 10x-10+12x-4+30=180 | | -32x+2=-62 | | 7.81+81=60.9961+9x | | 4x^2+6x-9=0 | | .125(x-56)=.875 | | v-18=2 | | a+25=31 | | 2(x-4)-9x=-4x+13 | | (8x-3)2=20 | | c-6=9 | | x^2-12x-4=0 | | -20x^4-36x^2+54=0 |