Spoilers!
121โ๐โ3๐โ7๐=0 => i=7 as shown in the example before the puzzle, 3i does not stand for multiplication
Spoiler for #2
4๐+0๐+5๐+8๐+5๐=40585 => t = ! for factorial. This is actually quite famous, and it should struck any puzzle lover when
they see 0 followed by an operator.
Spoiler for #3
1+2๐+3๐+4=5๐โ6+7โ8 => s = ^2 for square operator. This breaks the restriction about one character and instead you should
think about one operator.
Spoiler for #4
๐ฉ2+๐ฉ๐ฉ4=๐ฉ8 => B = SQRT for square root. Obviously B = 1+ is also a valid answer but it doesn't work for the final answer.
Spoiler for #5
(9+7๐/2=(4โ2๐(6โ2๐ => e = ) the right parenthesis. This is an easy one.
Spoiler for #6
0๐1666๐๐๐+0๐333๐๐๐=0๐5 => h=. the dot. This is the first puzzle with the same symbol representing two different
stuffs, the decimal separator and the ellipsis.
Spoiler for #7
(80ยท70ยท60๐พ)๐พ50=40โ30 => W = %. This is a hard one if you don't write C++. % stands for percentage and modular arithmetic.
Final spoiler
((๐ฉ6๐๐๐ยท13๐พโ๐๐+0๐4๐๐ = ((SQRT(6)^2)! * 13%) - 7^2 + 0.4)^2=45^2=2025 It really is a magnificent year, isn't it?