[tex]\huge\boxed{\tt5x² - 4y}[/tex]
[tex]\large\boxed{\begin{array}{} \tt5x {}^{2} - 4y \\ \tt5(4) {}^{2} - 4(3) \\ \tt5(16) - 12 \\ \tt80 - 12 = 68\end{array}}[/tex]
[tex]\large\boxed{\begin{array}{} \tt5x {}^{2} - 4y \\ \tt5(0) {}^{2} - 4(0) \\ \tt5(0) - 0 \\ \tt0 - 0= 0\end{array}}[/tex]
[tex]\large\boxed{\begin{array}{} \tt5x {}^{2} - 4y \\ \tt5( - 4) {}^{2} - 4( 3) \\ \tt5(16) -12 \\ \tt80- 12= 68\end{array}}[/tex]
[tex]\large\boxed{\begin{array}{} \tt5x {}^{2} - 4y \\ \tt5(3) {}^{2} - 4(0) \\ \tt5(9) - 0 \\ \tt45- 0= 45\end{array}}[/tex]
[tex]\large\boxed{\begin{array}{} \tt5x {}^{2} - 4y \\ \tt5( - 4) {}^{2} - 4( - 4) \\ \tt5(16) + 16 \\ \tt80 + 16 = 96\end{array}}[/tex]
