That refers to terms that have exactly the same combination of variables. For example, in 5xy + x2 - 3xy, the first and last term have the same variables, so they are similar. You can simplify an expression by combining such terms.
Symmetry
The Maths terms combination and permutation apply in chemistry when making the expected industrial calculation.
1st
A gross is 144.
A score is equal to 20.
Symmetry
A expression in maths is a collection of terms without an equality sign.
The Maths terms combination and permutation apply in chemistry when making the expected industrial calculation.
To turn.
1st
It's 10 years.
A gross is 144.
1000 cc
because there is no mathematical terms in English and maths tends to suck anyway
For answer see http://mathsduck.co.uk/
a power is a power
A score is equal to 20.