2/3x-15=1/2x+3 怎么算

(x+2)(x+3)-(x+6)(x-1) 怎么算? x(x-2)+m(1-x)=3怎么算 (x^10-x^5+1)/(x^2+x+1) 怎么算?(x^10-x^5+1)/(x^2+x+1)=（x^8-x^7+x^5-x^4+x^3-x+1) 2X-3分之1X=15怎么算? (x-1)(x-2)(x-3)(x-4)-(x^2-5x)^2-10(x^2-5x)怎么算? x-1/x-2-x-3/x-4=x-2/x-3-x-4/x-5怎么做? (2x-1)(2x+1)+3(x+2)(x-2)=(7x-1)(x+1)怎么算? 2/x+2/(x+3)+(x-2)/(x+3)=1怎么算 x(x-y)+15=(x+3)(x-2)怎么算 X-40%X+1200=2/3X怎么算 x(7-8x)=3(x-2) 怎么算 怎么算x 2x 3x=120 x/2+x/3+x/4=65怎么算? 怎么算x+2x+3x=120 X+2X+(180-3X)=180 怎么算? y+(1+x)(2+x)(3+x)导数怎么算, (X-3)/(X^2-4)*(X^2-4X+4)/(x^2-x-6)-1/(x+2)怎么算?(X-3)/(X^2-4)*(X^2-4X+4)/(x^2-x-6)-1/(x+2),怎么算? (2x+1)²-(x+3)(3-x)=6x怎么简便算?