x={1;3;5;15}

 31+25+46+15+14+39
=(31+39)+(25+15)+(46+14)
=     70    +     40     +      60
=     70    +    ( 40+60 )
=     70    +        100
=      170

2(X-51)=2.2^3+20
2(X-51)=2.8+20
2(X-51)=16+20
2(X-51)=36
   X-51 =36:2
   X-51 =18
       X   =18+51
       X   =69

a, x+524=2256-145
    x+524=2111
          x  =2111-524
          x   =1587
b,x-714=1833+2187
   x-714=4020
         x  =4020+714
         x  =4734

c

I'm about to eat breakfast
today is Monday
I love Maths
Her voice is so sweet
Saturday I usually go camping