$\left(-1\right)^2\left(+2\right)-\left(-1\right)\left(+2\right)-8$
$y'=1+\frac{1}{y^2}$
$\cos^220-\sin^220$
$-3^4.+3^2$
$\int\frac{6x}{\left(x-2\right)\left(x+3\right)}dx$
$\frac{25m^2+5m-6}{5m-2}$
$y=ty-2y+t-2$
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