$1+6+8-87x$
$-8x-5-x=-15x-17-6x$
$x^2\:+\:26x\:+\:42$
$\frac{1}{cot^2\left(x\right)}+1=\frac{1}{cos^2\left(x\right)}$
$\int2cos\left(x-5\right)dx$
$\left(\frac{x}{2+y}\right)^2$
$\int\left(\frac{v}{1+3v^2}\right)\:dv$
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