$\int_{-\pi}^0\left(\pi^2\right)dx$
$3x^2-2x+27$
$x^2+14x=15$
$5e^{-2x}-4e^x\:+\:6e^{-2x}-8e^x\:+\:4$
$\frac{6}{x}+20$
$-4s^3-18s^2-22s-6$
$2x^2+4y=5$
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