$-x^2-2x-1$
$\arcsin\left(3.742\right)$
$\int\left(\frac{-49\cdot\cos\left(x\right)}{20\cdot x}\right)dx$
$\frac{x^2}{81}+\frac{y^2}{36}$
$\int\frac{-2x^2+8x+8}{\left(x^2+4\right)\left(x-2\right)^3}dx$
$y=\frac{1}{16}\cdot x^4$
$x^3+xy^2+y^3-5x^2y+x^3-4xy^2-5y^3$
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