Subtraction of fractions:
4_ 1/4 - 2_ 5/8
1 _ 5/8
3_ 1/3 divided by 5/6
4
4 + 2(8^2 -4) - 20/2 =
114
5^2 + 10 -1 * 25/5 =
30
2.5 + 3.5 × 0.01
2.535