(1) 15+3(1-a)-(1-a-a²)+(1-a+a²-a³)(2)(4a²b-3ab)+(-5a²b+2ab)(3) (6m²-4m-3)+(2m²-4m+1)(4) (5a²+2a-1)-4(3-8a+2a²)(5) 3x²-[5x-(½x-3)+2x²]

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(1)15+3(1-a)-(1-a-a²)+(1-a+a²-a³)(2)(4a²b-3ab)+(-5a²b+2ab)(3)(6m²-4m-3

(1) 15+3(1-a)-(1-a-a²)+(1-a+a²-a³)(2)(4a²b-3ab)+(-5a²b+2ab)(3) (6m²-4m-3)+(2m²-4m+1)(4) (5a²+2a-1)-4(3-8a+2a²)(5) 3x²-[5x-(½x-3)+2x²]
(1) 15+3(1-a)-(1-a-a²)+(1-a+a²-a³)
(2)(4a²b-3ab)+(-5a²b+2ab)
(3) (6m²-4m-3)+(2m²-4m+1)
(4) (5a²+2a-1)-4(3-8a+2a²)
(5) 3x²-[5x-(½x-3)+2x²]

(1) 15+3(1-a)-(1-a-a²)+(1-a+a²-a³)(2)(4a²b-3ab)+(-5a²b+2ab)(3) (6m²-4m-3)+(2m²-4m+1)(4) (5a²+2a-1)-4(3-8a+2a²)(5) 3x²-[5x-(½x-3)+2x²]
1.原式
=15+3-3a-1+a+a²+1-a+a²-a³
=18-3a+2a²-a³
2.原式
=4a²b-3ab-5a²b+2ab
=-a²b-ab
3.原式
=6m²-4m-3+2m²-4m+1
=8m²-8m-2
4.原式
=5a²+2a-1-12+32a-8a²
=-3a²+34a-13
5.原式
=3x²-5x+0.5x-3-2x²
=x²-4.5x-3