Aiuto in Matematica?

[brenda flores roman]

Mi aiutate a risolvere questi due esercizi:
[(x^3 + 1) : (x + 1) - 3] : ( x - 2 )= ?
[(a^5 -1) : (a - 1) - a^4 ] : ( a + 1 ) + ( a - 1 )( a + 1 ) = ?

[bimbozza]

[math][(x^3 + 1) : (x + 1) - 3] : ( x - 2 )= ?[/math]

[math][(x + 1)(x^2+1-x) : (x + 1) - 3] : ( x - 2 )= [/math]

[math][x^2+1-x - 3] : ( x - 2 )= [/math]

[math][x^2-x - 2] : ( x - 2 )= [/math]

[math](x-2)(x+1) : ( x - 2 )= x+1[/math]

--------------------------------------------------------------

[math][(a^5 -1) : (a - 1) - a^4 ] : ( a + 1 ) + ( a - 1 )( a + 1 ) = ?[/math]

[math][(a -1)(a^4+a^3+a^2+a+1) : (a - 1) - a^4 ] : ( a + 1 ) + a^2 - 1 =
[/math]

[math][a^4+a^3+a^2+a+1 - a^4 ] : ( a + 1 ) + a^2 - 1 = [/math]

[math][a^3+a^2+a+1 ] : ( a + 1 ) + a^2 - 1 = [/math]

[math](a+1)(a^2+1) : ( a + 1 ) + a^2 - 1 = [/math]

[math] a^2+1 + a^2 - 1 = 2a^2[/math]