$\pi\left(4.4\right)^2$
$\lim_{x\to\infty}\left(\sin\left(\frac{\pi}{2}x\right)\right)$
$\frac{d}{dx}x^2y+y^2x=-2$
$\pi\int_{-3}^3\frac{81}{x^2+9}dx$
$\left(\frac{3}{2}wy-4w^{2}\right)$
$-10x+3<\frac{1}{5}x+3$
$2y^2-32$
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