$1+14x^2\:y+49x^4+-1$
$-\left(1\right)e^{-1}-e^{-1}$
$log\left(2x\right)+log\left(x-5\right)=2$
$\int4x^3\cdot e^{4x}dx$
$23x+12xy-39x+13xy-20xy+40x$
$7.45+5.48+3.150$
$\left(\frac{5x^2-y}{2x}\right)^2$
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