derivointisetti

a, $f\left(x\right)\ =\ 2x\ -\left(x+7\right)$
$=\ 2x\ -x\ -7$
$=x-7$
$f'\left(x\right)\ =\ 1$

b, $g\left(x\right)\ =\ \left(x-2\right)\left(x+3\right)$
$x^2+3x-2x-6$
$x^2+x-6$
$g'\left(x\right)=2x+1$

c, $h\left(x\right)\ =\ \frac{4x^3+3x^2}{3}=\frac{4}{3}x^3+x^2$
$h'\left(x\right)=\frac{4}{3}\cdot3x^2+2x=4x^2+2x$