Logic Masters Deutschland e.V.

A while back, SSG challenged me to set with skyscrapers and I challenged them to set with equations. Their puzzle is here. My take is below.

Rules:
Normal sudoku rules apply.

Skyscrapers: Digits in the grid represent skyscrapers, with their values corresponding to their heights. Taller skyscrapers obscure all shorter skyscrapers behind them. Clues outside the grid indicate the number of skyscrapers that can be seen in that row/column, from the line of sight of the clue.

Equations: Correctly complete all equations in and around the grid. Pills spanning multiple cells represent numbers with that many digits.

Puzzle:

Links to play:
SudokuPad
Penpa+