b-b+b-b+b
2x-3y
65% of 400 + 35% of 600 = ?
6!5!4!3!3!
5+5
e^0
ax+by=764 where x=20 and y=36 and a+b=33
4532 ÷ √1936 + 524 ÷ 4 = ?
ax+by=1180 where x=20 and y=36 and a+b=50
80 – 42 ÷ 14 – 19 × 3 = ?
