In Problems $43-50,$ find the following for each function:

$($a$)f(0)$

$($b$)f(1)$

$($c$)f(-1)$

$($d$)f(-x)$

$($e$)-f(x)$

$($f$)f(x+1)$

$($g$)f(2x)$

$($h$)f(x+h)$

$43.f(x)=3x^2+2x-4$

$44.f(x)=-2x^2+x-1$

$45.f(x)=\frac{x}{x^2+1}$

$46.f(x)=\frac{x^2-1}{x+4}$

$47.f(x)=|x|+4$

$48.f(x)=\sqrt[\phantom{2}]{x^2+x}$

$49.f(x)=\frac{2x+1}{3x-5}$

$50.f(x)=1-\frac{1}{(x+2{)}^2}$