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   #include <math.h>
   #include <stdio.h>	
   #define Pi 3.14
   int main(void)
{ 
  float r,b1,s1,x,
          f=4.215,
          a=286.35,
          dk=8.351,
          c=6.28,
          b=-12.6;
printf("Введіть значення змінної x: "); scanf("%f", &x);
   r=x*b+f;
   s1=pow(a+r, 1.0/2.0);
   b1=a+pow(pow(s1,2.0)+2*pow(c,x),2.0)/r+dk*pow(sin(c),2.0);
   printf(“r=%f,  s1=%f,  b1=%f” , r, s1, b1,);
   return0
}
 

prog.c: In function ‘main’:
prog.c:16:11: error: stray ‘\342’ in program
    printf(“r=%f,  s1=%f,  b1=%f” , r, s1, b1,);
           ^
prog.c:16:12: error: stray ‘\200’ in program
    printf(“r=%f,  s1=%f,  b1=%f” , r, s1, b1,);
            ^
prog.c:16:13: error: stray ‘\234’ in program
    printf(“r=%f,  s1=%f,  b1=%f” , r, s1, b1,);
             ^
prog.c:16:16: error: expected expression before ‘%’ token
    printf(“r=%f,  s1=%f,  b1=%f” , r, s1, b1,);
                ^
prog.c:16:34: error: stray ‘\342’ in program
    printf(“r=%f,  s1=%f,  b1=%f” , r, s1, b1,);
                                  ^
prog.c:16:35: error: stray ‘\200’ in program
    printf(“r=%f,  s1=%f,  b1=%f” , r, s1, b1,);
                                   ^
prog.c:16:36: error: stray ‘\235’ in program
    printf(“r=%f,  s1=%f,  b1=%f” , r, s1, b1,);
                                    ^
prog.c:17:4: error: ‘return0’ undeclared (first use in this function)
    return0
    ^~~~~~~
prog.c:17:4: note: each undeclared identifier is reported only once for each function it appears in
prog.c:17:11: error: expected ‘;’ before ‘}’ token
    return0
           ^
           ;
 }
 ~          
prog.c:6:11: warning: variable ‘b1’ set but not used [-Wunused-but-set-variable]
   float r,b1,s1,x,
           ^~
prog.c:12:63: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result]
 printf("Введіть значення змінної x: "); scanf("%f", &x);
                                                               ^~~~~~~~~~~~~~~

Standard output is empty