$\frac{x+2}{4}=\frac{x-5}{5}$

$\int sen\:\left(x+7\right)dv$

$3+4\left(16-2\cdot4\right)$

$4x^2-20x-24y=-97$

$\int\frac{3x-4}{\left(x+1\right)^{2}}dx$

$\left(b^5+4c\right)\left(b^5-8c\right)$

$\frac{1}{w}\cdot\left(-\sin\left(t\right)\right)+\frac{1}{y}\cdot\cos\left(t\right)$