(x+3) ​6

(x+3)(x+3)=x²+6x+9

(x²+6x+9)(x+3)=x³+6x²+9x+3x²+18x+27=x³+9x²+27x+27

(x³+9x²+27x+27)(x+3)=x⁴+12x³+54x²+108x+81

(x⁴+12x³+54x²+108x+81)(x+3)=x⁵+15x⁴+90x³+270x²+405x+243

(x⁵+15x⁴+90x³+270x²+405x+243)(x+3)=

I'll leave the last one to you