Answer
$-18$
Work Step by Step
Points on the graph:
$(-1.5,1)$, so $f(-1.5)=1,$
$(-0.9,0)$, so $f(-0.9)=0,$
$(\pi,-4), $so $f(\pi)=-4,$
$(-3,2), $so $f(-3)=2,$
$(1,-2), $so $f(1)=-2$
$(-\pi,3), $so $f(-\pi)=3.$
So, we calculate
$\sqrt{1+0}-(-4)^{2}+2\div(-2)\times 3=1-16-3=-18$
