The operations $\bigtriangledown $ and $\bigtriangleup $ are defined as follows:
- $x \bigtriangledown y = 4x-5y$
- $x \bigtriangleup y = 4y+4$
**Find $(5 \bigtriangledown 0) \bigtriangleup -5$.**
[[☃ numeric-input 1]]
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