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[roganov@aorus bin]$ ./sage
┌────────────────────────────────────────────────────────────────────┐
│ SageMath version 9.2, Release Date: 2020-10-24                     │
│ Using Python 3.8.5. Type "help()" for help.                        │
└────────────────────────────────────────────────────────────────────┘
sage: var('x')                                                                  
x
sage: h = cos(1/2*x)*sqrt(4-x^2)                                                
sage: integrate(h,x)                                                            
integrate(sqrt(-(x + 2)*(x - 2))*cos(1/2*x), x)
sage: integrate(h+x,x)                                                          
1/2*x^2
sage: integrate(cos(1/2*x)*sqrt(4-x^2)+x,x)                                     
1/2*x^2