用代码形式写出计算式的

你好！代码供参考

%(1)
1.369^2+sin(7/10*pi)*sqrt(26.48)/2.9
%(2)
z2 = pi/(12+1e-5)
%(3)
roots([3,0,4,-5,-7.2,5])

计算结果

ans =

   3.309712036467368


z2 =

   0.261799169633175


ans =

 -0.304557280459027 + 1.621727238754070i
 -0.304557280459027 - 1.621727238754070i
 -1.006641505350697 + 0.000000000000000i
  1.019018483864552 + 0.000000000000000i
  0.596737582404200 + 0.000000000000000i