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3a+2b=5ab 5y﹣3y=2 3x2y﹣2yx2=x2y ﹣3x+5x=﹣8x
(﹣2xy)2=﹣4x2y2 x6÷x3=x2 (x﹣y)2=x2﹣y2 2x+3x=5x
-3x2y·5x2y=2x2y -2x2y3·2x3y=-2x5y4 35x3y2÷5x2y=7xy (-2x-y)(2x+y)=4x2-y2
7a+a=7a2 3x2y-2yx2=x2y 5y-3y=2 3a+2b=5ab
2x+3y=5xy (﹣2x2)3=﹣6x6 3y2•(﹣y)=﹣3y2 6y2÷2y=3y
7a+a=7a2 5y﹣3y=2 3x2y﹣2yx2=x2y 3a+2b=5ab
x2+x2=x4 x2+x3=2x5 3x﹣2x=1 x2y﹣2x2y=﹣x2y
(xy)3=xy3 x5÷x5=x 3x2•5x3=15x5 5x2y3+2x2y3=10x4y9
(x+1)(x+4)=x2+5x+4 (y+4)(y-5)=y2+9y-20 (m+2)(m-3)=m2-m-6 (x-3)(x-6)=x2-9x+18
3x2y﹣2yx2=x2y 5y﹣3y=2 7a+a=7a2 3a+2b=5ab