$f(\frac{1}{4})=5\ast \frac{1}{4}+6=\frac{5}{4}+6=1\frac{1}{4}+6=7\frac{1}{4}$
$f(-3)=5\ast (-3)+6=-15+6=-9$
$f(0,5)=5\ast 0,5+6=2,5+6=8,5$
$f(6\frac{2}{5})=5\ast 6\frac{2}{5}+6=5\ast \frac{32}{5}+6=32+6=38$

f(p) = 5p + 6
f(−2p) = 5 * (−2p) + 6 = −10p + 6
$f(\frac{3}{5}p)=5\ast \frac{3}{5}p+6=3p+6$
$-f(5p)=-(5\ast 5p+6)=-(25p-6)=-25p-6$

f(a + 1) = 5(a + 1) + 6 = 5a + 5 + 6 = 5a + 11
f(5 − a) = 5(5 − a) + 6 = 25 − 5a + 6 = 31 − 5a
f(a) − 6 = 5a + 6 − 6 = 5a
$f(\frac{a}{10})-3=5\ast \frac{a}{10}+6-3=\frac{a}{2}+3$

f(a − 3) + 1 = 5(a − 3) + 6 + 1 = 5a − 15 + 7 = 5a − 8
f(a + 4) − 2 = 5(a + 4) + 6 − 2 = 5a + 20 + 4 = 5a + 24
f(1 − 2a) = 5(1 − 2a) + 6 = 5 − 10a + 6 = 11 − 10a
$-f(\frac{a+6}{5})=-(5\ast \frac{a+6}{5}+6)=-(a+6+6)=-(a+12)=-a-12$