$(a+b{)}^3=a^3+3a^{2}b+3a{b}^2+b^3$

$(a+4{)}^3=a^3+3a^2\ast 4+3a\ast 4^2+4^3=a^3+12a^2+3a\ast 16+64=a^3+12a^2+48a+64$

$(2a+1{)}^3=(2a{)}^3+3\ast (2a{)}^2\ast 1+3\ast 2a\ast 1^2+1^3=8a^3+3\ast 4a^2+6a+1=8a^3+12a^2+6a+1$

$(2a+3b{)}^3=(2a{)}^3+3\ast (2a{)}^2\ast 3b+3\ast 2a\ast (3b{)}^2+(3b{)}^3=8a^3+9\ast 4a^{2}b+6a\ast 9b^2+27b^3=8a^3+36a^{2}b+54a{b}^2+27b^3$

$(x+3z{)}^3=x^3+3x^2\ast 3z+3x\ast (3z{)}^2+(3z{)}^3=x^3+9x^{2}z+3x\ast 9z^2+27z^3=x^3+9x^{2}z+27x{z}^2+27z^3$

$(2b+3{)}^3=(2b{)}^3+3\ast (2b{)}^2\ast 3+3\ast 2b\ast 3^2+3^3=8b^3+9\ast 4b^2+6b\ast 9+27=8b^3+36b^2+54b+27$