$\left(5a^2x^3-3a^2x+3\right)\left(4a^2x^3-a^2\right)$

$.5+.605+70.1277+7.31+1.44$

$2\left(x+2\right)>7$

$\left(\frac{2}{7}x^3+\frac{1}{2}xy\frac{1}{5}x^2y\right)\cdot\left(\frac{1}{4}x^2-\frac{2}{3}xy+\frac{5}{6}y^2\right)$

$\int cos^2\left(\frac{y}{2}\right)dy$

$\frac{3}{x}-36$

$\int\frac{4x^2+13}{4x^2+9}dx$