First few questions were pretty easy. 7/8/9 were horrible!
Completely work out how to use quadratics to get the y co-ordinate for the 7^x curve intersection but I used the solver on my calculator to get y=4, doubt I'll get more then 1/2 marks on that.
I got the shaded area as 222 (3 S.F).
Trig identities (tan θ-1)(sin2 θ-3cos2 θ)
(tan θ-1)(sin2 θ-3(1-sin2 θ))
(tan θ-1)(4sin2 θ-3)
tan θ=1 or +/-√3
so the tan values between 0-180 were 60,135,120.
Hopefully the grade boundaries will give a bit...