$x\cos\left(y\right)=\sin\left(x\right)$
$\cos\left(4\pi x\right)=0$
$x^2-9x+14\le0$
$49-84b+144b^2$
$\frac{9}{16}n^2-\frac{3}{2}n+1$
$\int\left(-\frac{2}{21}e^{\left(3-2x\right)}\right)dx$
$\lim_{x\to\infty}\left(\frac{3^x+4^x}{4}\right)^{\frac{1}{x}}$
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