C programming calculation problems

Users questions: Programmed calculation: y (x) = (p (x) * p (x) +5 x) * p (x +2) * (p (x +5)-sqrt (x)) in which: p (u) = (f (u * 0.3, x + u) + u * 2) * (2x) f (v, w) = (w + v) * (7v) Part I of the : # include stdio.h # include math.h floatb1, b2, b3; floatp, P1, P2, P3; floatx, x1, x2, x3; floaty; floatequat ion(floatu){floatw,v,f,p;v=u*0.3;w=x+u;f=(w+v)*(7*v);returnp=(f+u*2)*(2*x);}main(){printf( pleaseinp ; P3 = p; y = ((p1 * p1 +5 * x) * (p2-sqrt (x))) * p3; printf ("y =% f * n", y);} but the output results have been is zero, trouble wrong with trying to find help, very grateful na!
Experts answer: I faint, do not know Compilation of what is meant for? ? Rash is a formula for it? ? Feel should be with the type and scope of data
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