12+7*3+11-5*3
(a
2 − 1)(a
2 + 1)(a
2 + 2) − (a
2 − 1)
3 − (2a − 1)
2
2/7 + 4/5
4/ $\sqrt{\Box}$ 0.0025
2 2/9 divided by 1 1/3
solve the simulataneous equations:
y=1/4x+5
y=-2x+1/2
x(4x-2)+x(5x+6)
loga/logb
simplify 51/180
lnb/lna
