$56b-56$
$4\cdot x=18.8$
$54\:-\:\left(43\:+\:16\right)\:and\:\left(54\:-\:43\right)\:+\:16$
$\int_a^b\cos\left(u\left(x\right)\right)u\left(x\right)dx$
$x^2+11x+1$
$\frac { 5 x ^ { 4 } + 6 x ^ { 3 } + 2 x ^ { 2 } + 3 } { x + 1 }$
$4a^2^2^2-1$
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