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Using the Comparison Test for Integrals if necessary, classify each of the following integrals.

• [math]\int_{-\infty}^0 e^{-x^2} dx[/math]
• [math]\int_1^{\infty} \frac1{x^2} \sin x \; dx[/math]
• [math]\int_0^{\infty} e^{-x} \sin x \; dx[/math]
• [math]\int_3^{\infty} \frac1{\sqrt{(x-1)(x-2)}} dx[/math]
• [math]\int_0^1 x \sin \frac1x dx[/math]
• [math]\int_0^1 \frac1{\sqrt{(x-1)(x-2)}} dx[/math].