Hi Photomath Team,
This bid is for translating phrases from your app from English To Hindi.
I have done too many this kind of translation and won't mind doing it for you.
I use Auto Call Recorder, Freelancer Android App, Outlook Android App, Google Fit, 30 Days Fitness Challenges, Jio Music, And many more apps in my Android Smartphone (I have currently access to android smartphone, So can use your app before translating if you like).
For sample purpose here is a sample for a phrase which you have included in your app screenshots.
"Move Constants to the right side and change it's side"
"स्थिरांकों को दाए तरफ करें और उनके चिन्ह बदलें"
This phrase is for sample purpose, i am a native Hindi speaker so the translation will be in full speaking language.
I am on top of freelancer.com with the skill Hindi.
Also mentioning one thing which i think will be plus, Maths is a language of mine till Higher Secondary Level.
You may ask further question if you like, and also i can assure you that the budget is final and i am an individual so won't outsource your work to anyone else and will do it by myself.
Regards
Vivek