помогите решить уровнения
1) (x+3)(x-2)-(x-3)(x+3)-5=6x-7
2) x3(икс куб) +2x-9x-18=0
3) (5-x)2(квадрат) -(3x-2)*(2x+1)= x*(2-5x)
4) 2|x-1|-3x-5= 2-2(3x-1)-2

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