so we need to solve:
[tex]h(-3)=5\cdot(-3)^4+7\cdot(-3)^3-4\cdot(-3)+3[/tex]first, let's solve the exponential (remember if the number is odd, the result of the exponential is negative because of the -3)
[tex]h(-3)=5\cdot81+7\cdot(-27)-4\cdot(-3)+3[/tex]now the multiplications
[tex]\begin{gathered} h(-3)=405-189+12+3 \\ \text{note: negative}\cdot negative=positive \\ \text{negative }\cdot\text{ positive= negative} \end{gathered}[/tex]and finally the sum.
and the answer is:
[tex]h(-3)=231[/tex]