formula

<use xlink:href="/assets-global/icons/svg-sprite.svg?v=2021-09-21-145101-a53d444-022541#ico_plus"> <use xlink:href="/assets-global/icons/svg-sprite.svg?v=2021-09-21-145101-a53d444-022541#ico_minus">

<use xlink:href="/assets-global/icons/svg-sprite.svg?v=2021-09-21-145101-a53d444-022541#ico_plus"> <use xlink:href="/assets-global/icons/svg-sprite.svg?v=2021-09-21-145101-a53d444-022541#ico_minus">

<use xlink:href="/assets-global/icons/svg-sprite.svg?v=2021-09-21-145101-a53d444-022541#ico_plus"> <use xlink:href="/assets-global/icons/svg-sprite.svg?v=2021-09-21-145101-a53d444-022541#ico_minus">

<use xlink:href="/assets-global/icons/svg-sprite.svg?v=2021-09-21-145101-a53d444-022541#ico_plus"> <use xlink:href="/assets-global/icons/svg-sprite.svg?v=2021-09-21-145101-a53d444-022541#ico_minus">

<use xlink:href="/assets-global/icons/svg-sprite.svg?v=2021-09-21-145101-a53d444-022541#ico_plus"> <use xlink:href="/assets-global/icons/svg-sprite.svg?v=2021-09-21-145101-a53d444-022541#ico_minus">