$\left(\cos\:\left(20t\right)\right)^2$
$\left(2y^2-7\right)^2$
$\left(4x^2-3x-3\right)-\left(3x^3-4x^2-5\right)$
$\frac{d}{dx}\left(sec\left(3y\right)\right)$
$645.007+64.123$
$ab+ac^2$
$2x^2-3\ge4$
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