## Elementary Technical Mathematics

$$12y^4-16y^3+3y^2+5y-2.$$
We simplify by distributing and then combine similar terms as follows: $$(6y^3 -5y^2 - y + 2)(2y - 1)\\=12y^4-10y^3-2y^2+4y -6y^3 +5y^2 + y - 2\\ =12y^4-16y^3+3y^2+5y-2.$$