помогите пожалуйста с алгеброй 6класс
1) [tex] (b+5)^{3}-b (b-5)^{2}-25(1+b)^{2}
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2) [tex] 5(1-b)^{3}+5b(1+b)^{2}-(1-5b)^{2}
[/tex]
3) [tex] (2b-3)^{3}-4b^{2}(2b-6)+6b(2b-9)+10 [/tex]
4)[tex] (b+2)^{3}+(2b+1)^{3}-9b(b^{2}+2b+2)[/tex]
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