$6\mathrm{.}27)$ Draw a logic circuit for the following Boolean expression using NAND gates and inverters only:

$x\frac{?}{b}=ar(A)*B*C+(A+B)\frac{*}{b}ar(C)$

The NAND gates may only have two inputs each. Do not attempt to simplify the expression first before converting the gates. Convert the expression as is$.$