$2\cdot3.1416$
$\left(2y^3+7\right)^2$
$\left(5a+25\right)^2$
$\int_1^t\frac{\ln\left(x\right)^k}{x}dx$
$3m-2n-2nx^4+3mx^4$
$+3\left(x^4+y^2\right)$
$5a+2b=10$
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