-6-0?
1.5x2
250 x 25
25-8.35-1.3
11∙10^(7 )+ 5∙10^7-4∙10^7=
100/6.67
The second leg in a yacht race was half the length of the first leg, the third leg was two-thirds of the length of the second leg...
14-3×(5+2)÷4
8cosx+4=0
d²y/dx²-4xdy/dx+(4x²-1)y=-3ex²sin2x
d²y/dx