Left side (LHS) of equation

`lhs(eqn)`

Find the left side of the equation ```
2*y
== x^2
```

by using `lhs`

.

First, declare the equation.

syms x y eqn = 2*y == x^2

eqn = 2*y == x^2

Find the left side of `eqn`

by using `lhs`

.

lhsEqn = lhs(eqn)

lhsEqn = 2*y

Find the left side of the condition ```
x
+ y < 1
```

by using `lhs`

.

First, declare the condition.

syms x y cond = x + y < 1

cond = x + y < 1

Find the left side of `cond`

by using `lhs`

.

lhsCond = lhs(cond)

lhsCond = x + y

Conditions that use the `>`

operator are
internally rewritten using the `<`

operator. Therefore, `lhs`

returns
the original right side. For example, `lhs(x > a)`

returns `a`

.

For an array that contains equations and conditions, `lhs`

returns
an array of the left sides of those equations or conditions. The output
array is the same size as the input array.

Find the left side of the equations and conditions in the vector `V`

.

syms x y V = [y^2 == x^2, x ~= 0, x*y >= 1]

V = [ y^2 == x^2, x ~= 0, 1 <= x*y]

lhsV = lhs(V)

lhsV = [ y^2, x, 1]

Because any condition using the `>=`

operator
is internally rewritten using the `<=`

operator,
the sides of the last condition in `V`

are exchanged.