can anyone help me what is wrong with my code

Question

in don`t know whats wrong with the editor in sololearn every time i write a code it shows an error while everything is alright ,,please dont type in input when it asks for instead just click
run and then click submit button and it says there is an error in line 275 or 276
there has been problems with my codes many time please help me
if any body has solution(in code) please help me know
https://code.sololearn.com/czq3Qi08AUv7/#py

Answer 1

At line 273-274 missing closing parenthesis

_object_distance=((_image_distance) - (_focal_length)**(-1))