-9+5×(-6) -(-4)2÷(-8)
15+(―)―15―(―0.25)
—48 ×
(2m+2)×4m2
(2x+y)2-(2x-y)2 (xy)2·(-12x2y2)÷(-x3y)
[(3x+2y)(3x-2y)-(x+2y)(3x-2y)]÷3x
-32 -[(-2)2 -(1-×)÷(-2)] 2x-19=7x+31
4×(-3)2-13+(-)-|-43| -= 1
化简(求值)的值,其中
先化简,再求值,已知a = 1,b = —,求多项式的值
-2-(-3)×(-1)-(-1) -1-(1-0.5)××[2-(-3)]
11+(-22)-3×(-11)
-2(x-1)=4 -8x=3-x
-(-6) -12-(1-0.5)×(-1)×[2-(-3)2]
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