$7n-n+4=16$
$3x^2+5x-1=0$
$\tan y+\cot y=\sec y\cdot\csc y$
$a.3\:+\:\left(+6\right)\:+\:\left(+89\right)\:+\:8\:+\:\left(+12\right)\:$
$\int\left(45x\right)dx$
$2\cdot\sin\left(2x\right)=1$
$f\left(x\right)=\frac{1}{\left(10+x\right)^2}$
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