$\lim_{x\to\frac{\pi}{2}}\left(1-\sin\left(x\right)\right)^{\tan\left(x\right)}$
$\cos2\left(\frac{1}{4}\pi\right)$
$\frac{sin\left(4x\right)}{4}=cos^3\left(x\right)sin\left(x\right)$
$x^2\:+\:3x^2\:-\:x$
$\int e\cdot\cos xdx$
$5x-3^{x^2}+2\:x\:-3\:+\:x$
$\frac{6.9}{3}$
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