$\left(7+15\right)\left(-9\right)-1$
$r^{2\:}+\:6r\:+\:9$
$\int_{-1}^1\left(\sqrt{\left(4-x^2\right)}\right)dx$
$x^2-4x+10$
$\frac{25}{4}x-\frac{3}{2}>1$
$\left(-2+9y\right)^4$
$\frac{188.26}{14}$
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