$\int\frac{15}{4}x^{\frac{5}{2}}dx$
$x^2+18x-4=0$
$8-\left(-3\right)\cdot\left(-15\right)$
$1.1+1.2+1.3+1.4$
$-52=-3x+2$
$\frac{2}{\sec\:\left(x\right)}=\frac{2-2\sin\:^2\left(x\right)}{\cos\:\left(x\right)}$
$x^3-9x^2+27-27$
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