30×5= 25×4×17= 37+68×0=
n×n= 380+320= 56×78×0=
100÷25= 24×3= 25×8= y+y=
a×6 =
d×d×2 =
m×n
3×b×4 =
4x + 2x = 13m - 4m = b + b + b + b =
a×4×b = 6×x + 6×y = x·x + y + y =
