PD66-68. Hope these don't cause a math exodus

An equation is 2nd to 0.
x² + 2y = 1
√c
= i – b
My goodness, ain't algebra fun!

Most mnemonics in math for my pop's
Younger sister have proved to be flops.
Please Excuse My Dear Aunt—
Sally's knowledge is scant
Of the order of algebra ops.

"Please Excuse My Dear Aunt Sally" is a mnemonic (memory aid) for remembering the order of operations when doing algebra problems -- Parentheses, Exponents, Multiplication, Division, Addition, Subtraction.