Respuesta: a ) ( a²+b² )³ = a⁶+3a⁴b⁶+3a²b⁴+b⁶(a²+b²)³= (a²)³+3(a²)²(b²)+3(a²)(b²)²+(b²)³= a⁶+3a⁴b²+3a²b⁴+b⁶(4+13x²)³ = 64+2652x²+1507x⁶(4+13x²)³= (4)³+3(4)²(13x²)+3(4)(13x)²+(13x²)³= 64+48(13x²)+12(169x²)+1506x⁶= 64+624x²+2028x²+1507x⁶= 64+2652x²+1507x⁶