.mybtn .tn-atom {
    border-radius: 40px 0px 40px 40px !important;
}

.t-submit {
    border-radius: 40px 0px 40px 40px !important;
}

.t450__right_buttons_but .t-btn_sm {
    border-radius: 40px 0px 40px 40px !important;
}