13×5=
70×900=
780÷6=
25×4-36=
4×120=
305÷5=
a×a=
3b+4b=
32+16-32+16=
m×n×9=
a+a=
1×x=
25×4=
125×8=
36+64-36+64=
27×2=
5×a×a=
30×5=
4x + 2x = 13m - 4m = b + b + b + b =
a×4×b = 6×x + 6×y = x·x + y + y =
a×6 =
d×d×2 =
m×n
3×b×4 =