Rules
x\times y=xy
Loose the multiplication sign
v \times w
vw
a \times a \times a \times a \times a
a^5
2a \times 4b
8ab
-2y \times -7y^2
14y^3
z \times x \times k\ times y = kxyz
Put variables in alphabetic order
y \times x
xy
f \times a^2 \times f^2 \times a^2
a^4 f^3
5x \times 2y
10xy
-2p^2q^4 \times 3pq^2
-6p^3q^6
x\timesx\times\x \times x=x^4
When you multiply with same variable, use powers
a\times b \times c \times d
abcd
k^3 \times m^2 \times m \times n \times m^5 \times k
k^4 m^8 n
-3a \times 2b
-6ab
-0.5m^3n^2 \times -6m^3n^2
3m^6 n^4
x^2 \times y^3 \times x\times y^2=x^3y^5
Each variable gets its own power
p \times m \times k \times g
gkmp
t^2 \times s^2 \times t^3 \times r^4 \times r^2
r^6 s^2 t^5
2r \times 4p \times -3q
-24pqr
2y^3 \times -4z^2 \times 2y^2
-16y^5z^2
2x^4 \times 3x^5=6x^9
Put the coeffincients in front and multiply them
f \times a \times d \times b \times c
abcdf
p^3 \times q^2 \times p \times p^4 \times q^4 \times q
p^8 q^7
-k \times -3f \times 2g \times -a
-6afgk
-2f^3 \times -g^4 \times -8f^2 \times -h
16f^5 g^4 h