Write a function of $x$ for each rule given.

a$)$ Multiplies the input by $8$ and then adds $3$

$f(x)=$

b$)$ Adds $3$ to the input and then multiplies by $8$

$f(x)=$

c$)$ Divides the input by $6$ and then subtracts $10$

$f(x)=$

d$)$ Subtracts $10$ from the input and then divides by $6$

$f(x)=$