This is a Friday special puzzle. Because of the P.I.HUNT, I am two puzzles offset for Fridays to be multiples of 5. Luckily, 50n-1 and 50n are traditionally special type puzzles, started from MellowMelon I believe.
49 is a square number, and so are 4 and 9, what a good time for a milemarker square made of square themed squares puzzle.
Draw a loop passing through centers of cells, traveling parallel to the edges, going through each cell at most once
Top left: Shade in every cell the loop does not go through. Unshaded numbers truthfully represent how many of their 8 orthogonal neighbors are shaded in this region, whereas shaded numbers lie, and give a number other than how many of their neighbors in this region are shaded.
Top right: There are some multicelled regions in this section, which are repeated. Within each copy of the same shape, the loop must be exactly identical. The loop doesn’t necessarily pass through every region.
Bottom Left: Masyu puzzle, however, the white circles are optional, the loop doesn’t have to pass through them, and the black circles are full, every possible black circle is given
Bottom Right: Rightface puzzle, with multiple robots entering at every spot that the loop enters this region going clockwise around the loop. Each robot travels at the same time, and follows the rightface rules and must exit the region following the loop. It is a condition on the solver to prevent two robots from wanting to enter the same square at the same time. Some black cells are already given.