$-7^4$
$\left(3x^3\right)\left(5xy^2\right)$
$\frac{x^4+2x^3-1}{x^2}$
$\left(-2x^7\right)\left(+10x^3\right)$
$\frac{22\left(sen45\right)}{sen35}$
$\int\frac{1}{\left(x^2-36\right)^{1.5}}dx$
$78 \cdot 4 + 18 - ( - 2 ) 11$
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