Simplify sec² (t) - 1 / sec² (t) to an expression involving a single trig function with no fractions. If needed, enter squared

Question

Simplify sec² (t) - 1 / sec² (t) to an expression involving a single trig function with no fractions.
If needed, enter squared trigonometric expressions using the following notation.
Example: Enter sin² (t) as (sin(t))².

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