$1513.35+1277.50$
$4.7-5.9$
$-\frac{3}{x^2+8x+16}$
$\int\:x^3e^{-3x^4}dx$
$\int\frac{\left(4-x\right)^3}{x}dx$
$\cos\left(x+\pi\right)-\cos x-1=0$
$-2x^2+98\ge0$
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