$\cos\:\left(2\pi\:x-2\pi\:y\right)-\cos\:\left(2\pi\:x+2\pi\:y\right)$
$\left(x^{15}-\frac{18}{5}\right)^2$
$\int\frac{1}{\left(x-1\right)\left(3x+1\right)}dx$
$\int\:\:8\sin\:^2\left(x\right)\cos\:^3\left(x\right)dx$
$x^2-x-y,\:x=5,\:y=3$
$li23\cdot2$
$2\cdot256$
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