1.
r1 r2 = r r2 + r r1 for r1
2. r1 r2 = r r2 + r r1 for r2
3. r1 r2 = r r2 + r r1 for r
4.
d1d2 = fd2 + fd1 for d1
5. d1d2 = fd2 + fd1 for d2
6.
b2 x2 + a2y2 = a2b2
for a2
7.
b2 x2 + a2y2 = a2b2
for b2
8.
S(1-r) = a - Ir for r
9.
Sn = ¹(n - 2) for n
10.
H(a + b) = 2ab for b
11.
12. m1 Lf + m1c1(T-T1)
+ m2c2(T-T2) = 0 for T