Medium
Find the derivative of the following function: $2 \tan x - 7 \sec x$.
- A$2 \sec^2 x - 7 \sec x \tan x$
- B$2 \sec^2 x + 7 \sec x \tan x$
- C$2 \tan^2 x - 7 \sec x \tan x$
- D$2 \sec^2 x - 7 \tan^2 x$
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