$-3x^2+13x+30$
$6n+3n^2-2n^2+9n$
$7-\left(-13\right)+5-2$
$\int senh^2xcoshxdx$
$2\cos\:\left(x\right)-3\cot\:\left(x\right)\csc\:\left(x\right)$
$144 \times 4 ^ { 4 } - 819 ^ { 4 } b ^ { 2 }$
$\left(x\:^3+7\right)\left(x^3-7\right)$
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