$\sqrt{4-25\left(\frac{2}{5}sin\:\theta\:\right)}$
$15x^2y-4x^2y+6x^2y+11x^2y$
$8x^6+125a^3$
$-27-\left[-5+\left(-9+8\right)\right]$
$\lim_{x\to-2}\left(-x\right)$
$\frac{1+sec\left(t\right)}{1+cos\left(t\right)}$
$6\left(x\right)^2-6x+9$
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