$-x^2-x+2\ge0$
$\int\frac{1}{\left(x^2+y^2\right)^2}dx$
$\left(6x^2-4y\right)^3$
$2^{\left(90-40\right)}$
$\left(7x^4-5x^2+2x-4\right)\left(x+3\right)$
$\frac{1}{4\left(3\infty^2+2\right)^2}$
$\frac{x+5y}{x}$
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