$- 4 x ^ { 2 } + 20 x + 25$
$6x^2-3x+8<0$
$\int4x^3\sqrt{3-4x^4}dx$
$1y^5\cdot1y^5$
$\lim_{x\to0}\left(x^{ln\left(2-e^x\right)}\right)$
$\log\left(\left(2x+5\right)^{2}\right)=4$
$\int\frac{2e^{-\frac{1}{x}}}{x^2}dx$
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