Answers created by Mind

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• How do I find a formula for #s_n# for the sequence -2, 1, 6, 13, 22,...?
  
• How do I evaluate #int(z +1) e^(3z) dz#?
  
• How do I find the derivative of #y = sin^2 x + cos^2x + ln(e^x)#?
  
• How do I evaluate the integral: #int_0^(7sqrt(3/2))dx / sqrt(49-x^2)#?
  
• What is the row echelon form of a #4xx4# matrix?
  
• How do I evaluate #int1/sqrt(1-4x^2)dx#?