1. (sec^2x-6tanx+7/sec^2x-5)=(tanx-4/tanx+2)

Question

2. (sin^3A+cos^3A/sinA+cosA)=1-sinAcosA

3. csc^6x-cot^6x+1+3csc^2xcot^2x

please help

Answer 1

Did you leave out an = sign in #3 ?