C Expression Writing Statement

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In mathematics we write many formula or expression, but in c programming for writing those formula, we have to write in another way, because C or Any Programming Language does not support math formula expression. so for writing those formula i am going to tell you how to write those formula:

For Example: 1
In above example you see the expression of U, here first i declare some variable as int and a,b,c,d,e,f and float variable g,h,i;  and then i am written the value of each words or expression. and in last i added all expression.  Now You See Example 2:

Now You See Example 3:
Now here i am not given the final answer its your task to give me answers (On Comment Box Below). So that you can make sure you understand writing of expression in programming language.

Please comment below on comment box with answers of Example 3: