$\sin\left(x+\frac{\pi}{2}\right)-\sin\left(x-\frac{\pi}{2}\right)=1$
$x-3y+2x+4$
$\frac{dy}{dx}\left(x^4y^2-x^3+2xy^3=0\right)$
$\lim_{x\to\infty}\left(cos\frac{2}{x}\right)^x$
$4a+3-2y-5a-7+47$
$-1.09+9.129$
$\int5^x\cdot\sin\left(x\right)dx$
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