Since I don't want to find a host for an edited image, I'm going to just write stuff here:
Equation (1) Square/Pentagon/Hexagon (SPH) + SPH + SPH = 45
Equation (2) Banana Bunch (4) + Banana Bunch (4) + SPH = 23
Equation (3) Banana Bunch (4) + 3'oclock + 3'oclock = 10
Equation (4) 2o'clock + Banana Bunch (3) + Banana Bunch (3) + Pentagon/Hexagon = ??
At first, I thought this was going to be some interesting thing where each character would perhaps represent a different portion of base10. In Equation (2), two banana bunches and an SPH leads to 23. One banana bunch and two clocks leads to 10. So perhaps the banana bunches would indicate 10' s position, and the number of inscribed shapes would indicate the 1's position.
Then I realized it's a lot easier (and maybe dissapointing) than that: it's literally just one of those "Gotcha!" puzzles that appear on social media. Here's my solution to it:
In Equation (1), three SPH = 45. 45/3=15. If you count up the number of corners, we get 4 from the square, 5 from the pentagon, 6 from the hexagon...which adds up to 15. So, the "rule" for an inscribed shape is "count up the number of corners, and you have the number the shape represents."
Equation (2) introduces bananas. Their representation is the number of bananas in the bunch. 4 bananas per bunch, across two bunches is 8. Add 8 to the 15 from the SPH, and we get 23. Still self-consistent.
Equation (3) introduces clocks. And their value is just that of the clock face. 4 bananas + 3*2 = 10.
Using these rules, Equation (4) translates to 2 + 3 + 3*(5+6). Which equals 38 if you follow the standard order of operations.
It looks like the author decided to be clever in representing their system of numbers, and did the other "check to make sure they're paying attention at the bottom of the page" trick.
This last bit, the "Make sure they read the page" bit leads me to believe that the actual solution is the following:
That said, this type of puzzle is pretty horrible, because they're typically so horrendously vague that nearly *any* interpretation can be made-up for that "gotcha" aspect. A series of symbols is set up in the first three lines, the rules of which we're left to infer, but which we cannot confirm. If the OP wanted to make this puzzle better, adding three more equations allowing us to confirm the rules that are implied are what we think they are would be the proper way to go about it. As it stands, this is something I'd expect to see viral on a Facebook page with wild (and probably as well-founded as mine) conspiracy theories as to what each symbol means. Check back on the OP to see what I mean, with another user's (probably equally valid) interpretation of the puzzle.
Which is ultimately the problem that these sorts of viral puzzles have: they're deliberately vague with no real verifiable solution and intentionally open to debate to encourage people to "impress their friends" by solving and sharing them. It's the puzzle-equivalent of the "Share this with 10 people or a ghost will steal your socks from the dryer" chain letters you see going around.