$y'=y-x$
$l^{-1}\left(\frac{s}{s^2+2s-3}\right)$
$8\sin\left(x-1\right)=-5.3$
$\int\frac{x-2}{\left(x^{2}+1\right)\left(x-1\right)}dx$
$f\left(x\right)=2x^2+10x-28$
$\frac{2x^5-14x^3+x^2+28x-15}{x^2-5}$
$x^2-22x+121=0$
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