$x^2+10x+39=23$
$\log\left(x\right)+\log\left(x+4\right)=\log\left(32\right)$
$\left(70-y\right)^2$
$\frac{x^3-4}{x^2}$
$\int100x^3cos\left(5x^4+3\right)dx$
$x^2\:-\:20\:+\:x^2\:+\:3x$
$x^2\:+5x-7\:\:\:\:si\:x=-1$
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