15
a=10;
b=20;
c=30;
width = c+b+a;
height = (a+b+c)/3;
area = width * height;
a=20;
length = c+b+a;
areatwo = width * length;
c=15;
d=2;
random = ((a+b+d-c)*3/9-6)^2^2;
b=-17;
abcd = b*3-a*3+c*3-d*3;
d=10;