There are 7 equations and 8 unknowns. Which variables are the unknowns? 

I made a guess.

MaplePrimes_Why_this_error.mw

@C_R couple = 2. 2023 conference.

@C_R What feedback? If you mean what the executive said, that was a couple of years ago.

I added your post to my bug report which I sent in earlier this year.

@C_R When I try your example, I can sometimes reproduce the effect, and sometimes I cannot. 

A couple of years ago at a Maplesoft convention, we got to ask the decision-makers at Maplesoft what they would like to work on if time and money were not a concern. And the first item mentioned was a new interface. While I am pleased with the command line using 2d-math input in the 2023 version, I hope the new problems introduced with version 2024, such as this one, will have motivated them to spend time and money on a new interface. 

@rcorless Combining your suggestion and the suggestions by @Mariusz Iwaniuk, I generate a result with an acceptable solution for y(t), but the expression for p(t) is still in the form of a differential: (d/dt(y(t)*m).  At least this result for y(t) is usable and not filled with RootOfs.

@Mariusz Iwaniuk Normally, I don't have to. In addition, adding a set, and not a list, of variables, which is my default, doesn't produce an output. But I will remember this option in the future. 

Sadly, a less-than-pleasing output.

@Paras31 Ah, I see why you started with this problem. Unfortunately, the problems shown are physically unrealistic. For example, a cake that is 450 F? No way. All the water would have evaporated, and the cake would have ended up as dust.

For the USA national holiday, we cook a turkey which is full of water. The oven temperature is set to 350F. The turkey is fully cooked when the thermometer that is stuck into the center of the turkey reads 165F. We don't let the turkey cook until it reaches 350F. A pumpkin pie is put in the oven where the filling is soupy. At some point, it gels, and that is when we pull out the pie. Again, it never reaches 350F. I took the roast beef example from my cookbook. These are physically sound situations. 

Pedagogically, I don't care for a problem for which the solution starts with putting numbers in for constants. The benefit of a computer algebra system (CAS) is that it provides an algebraic output for which constants can be altered. That is why I like the Explore procedure. However, pedagogy is subjective. The evaporation of water is not.  

@michele I forgot to add that hitting F5 switches between text, math and nonexecutable math. 

@michele At the execution prompt, click on the Text box above the pages (Not the big T. That gives you a Text group.) 

This allows you to switch between one input format vs. another. 

@lemelinm Your question caused me to update the instructions for the video, which I quickly shot for my students. However, I think I should reshoot it to describe the multiple ways of working with the maple.ini file. Unfortunately, most of my students use a Mac and so I don't know any of the complexities of working with that system. 

@C_R Thanks. I'll add your comment to the bug report I submitted on the beta website when it returns. (I would say the website is taking a Thanksgiving break, but the Canadians already have celebrated Thanksgiving. So, I'm not sure what is going on.) 

@lemelinm For some projects, I will have a special maple.ini file. I put the maple.ini file in the directory where the worksheets are stored. Then, when I "double-click" on the worksheet, which forces the working directory to be the one with the worksheet, that maple.ini file is loaded. 

Putting a maple.ini file in the users folder is the universal file used if there is no maple.ini file in the working directory. 

@lemelinm 

Alternatively, if you use different maple.ini files for different versions like I do:

1) Create a folder in the "c:/Program Files/Maple 2024" folder called "users." Usually, the folder is not there. 

2) Copy the maple.ini file into the "c:/Program Files/Maple 2024/users" folder. 

Sometimes, when I start mistyping the word dsovle, delete a couple of characters, and the font changes from then on to a non-italicized font. I can get it to go wrong when I hit the "evaluation" icon in the palette. That is the one that says f(x), vertical bar, y = x. 

As far as I can remember, I have never observed this behavior in previous versions. I still prefer to edit in v2023. 

@lemelinm I have access only to a physical US keyboard, so I have always wondered about the shortcut key options. I appreciate you telling me such a choice is not available. None of my international students mentioned this fact. I sense a short video showing folks how to access the Accents Palette (hidden by default) and then save the icon to the Favorites would be useful. 

Yep, after a while, if too many favorites are saved, it no longer becomes a time saver. I do appreciate the folks at Maplesoft added the feature of being able to arrange icons.