Multiply
2x+3x =
5x
What is full of holes but still holds water?
A sponge
3x+2y-x+4y =
2x+6y
I follow you all the time and copy your every move, but you can’t touch me or catch me. What am I?
Your Shadow
4x xx6x=
24x^2
I am an odd number. Take away a letter and I become even. What number am I?
Seven
4x^2 - 3xy+4x-8yx+x^2=
5x^2-11xy+4x
What is 3/7 chicken, 2/3 cat and 2/4 goat?
Chicago
3xy xx 4y-5xy+6x^2y-4xy^2 -2x xx7xy
8xy^2-8x^2y-5xy
What can run but never walks, has a mouth but never talks, has a head but never weeps, has a bed but never sleeps?
A River