$\int_{\frac{1}{4}}^2\frac{lnx}{x}dx$
$3-10^0$
$81x+19y-30z+6y+80x+x-25y$
$\frac{6x^3+31x^2-30x}{x^3-x^2-42x}$
$1+cscx^2\:+\:cotx^2$
$x^2-7x-44$
$\int\frac{x^2+x-3}{x^3+x^2-4x-4}dx$
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