$\int4\tan\left(x+2\right)dx$
$\left(9x-10y\right)\left(4x-5y\right)$
$16-36n^2$
$42+42+42+42$
$-\frac{7}{1}$
$x^2+3x=148$
$a4\:+\:ab3\:$
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