Simplify 3(4n-1)-3 then write the answer in factored form, Please it would be appreciated

What’s the answer ? use the picture to see the problem

Which sum or difference identity would you use to verify that cos (180° - q) = -cos q? a.) sin (a -b) = sin a cos b – cos a sin b b.) cos (a -b) = cos a cos b – sin a sin b c.) cos (a -b) = cos a cosb + sin a sin b d.) sin (a + b) = sin a cos b + cos a sin b

92ft long and 48 wide resurface 2.75$