%%HP: T(1)A(D)F(.);

"P1P2=X2-X1
D=X2-X1
D=  (X1-X2) ^ 2 + (Y1 - Y2) ^ 2
P=P1P/PP2
X=X1+RX2/1+R
Y=Y1+RY2/1+R
Xm=X1+X2/2
Ym=Y1+Y2/2
M=TAN 
M=Y1-Y2/X1-X2
TAG=M2-M1/1+M2M1
Y-Y1=M(X-X1)"
FTL2

