$\int_0^3\left(45xe^{-8x}\right)dx$
$26m+10x+14v+z-12m+15x-20z-12x-5m-5z-11z-7x$
$\int\frac{x}{x^2-x}dx$
$3abc-5acb+4ac$
$3xy^2,x=2,\:y=-1$
$\int\frac{2x-7}{x^2-6x+8}dx$
$sen\:3x+2=0.529919264$
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